Critical elements underpinning the emergence of the medical game ecosystem: gamifying traumatic brain injury rehabilitation in Finland

The healthcare sector is currently in the verge of a reform and thus, the medical game research provide an interesting area of research. The aim of this study is to explore the critical elements underpinning the emergence of the medical game ecosystem with three sub-objectives: (1) to seek who are the key actors involved in the medical game ecosystem and identify their needs, (2) to scrutinise what types of resources are required in medical game development and what types of relationships are needed to secure those resources, and (3) to identify the existing institutions (‘the rules of the game’) affecting the emergence of the medical game ecosystem. The theoretical background consists of service ecosystems literature. The empirical study conducted is based on the semi-structured theme interviews of 25 experts in three relevant fields: games and technology, health and funding. The data was analysed through a theoretical framework that was designed based upon service ecosystems literature. The study proposes that the key actors are divided into five groups: medical game companies, customers, funders, regulatory parties and complementors. Their needs are linked to improving patient motivation and enhancing the healthcare processes resulting in lower costs. Several types of resources, especially skills and knowledge, are required to create a medical game. To gain access to those resources, medical game companies need to build complex networks of relationships. Proficiency in managing those value networks is crucial. In addition, the company should take into account the underlying institutions in the healthcare sector affecting the medical game ecosystem. Three crucial institutions were identified: validation, lack of innovation supporting structures in healthcare and the rising consumerisation. Based on the findings, medical games cannot be made in isolation. A developmental trajectory model of the emerging medical game ecosystem was created based on the empirical data. The relevancy of relationships and resources is dependent on the trajectory that the medical game company at that time resides. Furthermore, creating an official and documented database for clinically valdated medical games was proposed to establish the medical game market and ensure an adequate status for the effective medical games. Finally, ecosystems approach provides interesting future opportunities for research on medical game ecosystems.

Sedentary behaviour and health with special reference to obesity and fatty liver in early midlife. The Cardiovascular risk in Young Finns Study

Background: Physical inactivity and positive energy balance pose a risk to health. They increase the risk of obesity and associated non-communicable diseases. Recently, also sedentary behaviour has been associated with obesity and non-communicable diseases. Nevertheless, it has been unclear which type of sedentary behaviour is the most harmful. It is also unknown whether the relationship of sedentary behaviour with obesity is truly independent of other factors, for example physical activity and diet. Longitudinal data are limited, and the direction of causality and the mechanism of action are still unknown. Aims: The aim of this study was 1) to identify the type of sedentary behaviour having the strongest association with obesity, 2) to explore the causal relationship of sedentary behaviour and weight increase, and 3) to additionally, investigate the relationship of sedentary behaviour with fatty liver. These were studied in cross-sectional and/or longitudinal settings using data from the Cardiovascular Risk in Young Finns Study. Special emphasis was put on the evaluation of a wide range of other lifestyle factors and risks for obesity and fatty liver. Subjects: 2,060 subjects (aged 33-50 years in 2011, of which 55 % were female) from the Cardiovascular Risk in Young Finns Study participating in follow-ups in 2001, 2007, and 2011. Measures: Self-reported time spent in various types of sedentary behaviour (I), or TV viewing time (I-III). Measured body weight, height and waist circumference (I-III), and genetic variants for high BMI (I). Fasting plasma concentrations of gamma-glutamyltransferase enzyme and triglyceride, calculated Fatty Liver Index (based on gamma-glutamyltransferase and triglyceride concentration, BMI and waist circumference), and the amount of intrahepatic fat measured with ultrasound (III). Self-reported leisure-time physical activity and active commuting, occupational physical activity, energy intake, diet, alcohol consumption, smoking, socioeconomic status, and sleep duration as possible confounders were considered (I-III). Results: TV viewing is the sedentary behaviour type that has the strongest association with obesity. Sedentary behaviour (TV viewing) precedes weight increase, and not the other way around. Sedentary behaviour (TV viewing) is associated with increased risk of fatty liver. Conclusions: Sedentary behaviour (especially high TV viewing time) is associated with increased risks of obesity and fatty liver. Intervention studies are needed to assess whether reduction of TV time would prevent obesity and fatty liver.

Människans liv med sömnbesvär och hur människor med sömnbesvär upplever kognitiv beteendeterapi

Sleep disorders are a common health problem in western countries. Every third working age person suffers from sleep deprivation and that often leads to other health problems as well. One can end up in a vicious circle, which can further decrease mood and ability to function. The aim of this thesis is to illustrate how sleep deprivation affects the lives of working age population and to deepen our understanding of life with sleep deprivation. Study questions are: how does sleep deprivation affect a working age person’s life and what kind of experiences do people have about cognitive-behavioural therapy as a treatment to sleep disorders. Theoretical perspective is based on clinical nursing science theories and the humanist view of man, which sees human as an entity. The methodology used is phenomenological approach and data analysis is conducted by using Ricœur’s hermeneutic phenomenological interpretation method. The empirical part is divided into two different sections. The material of the study consists of interviews and surveys done by people who have experienced sleep deprivation or sleep disorders. Two interviewees talked about their lives with sleep disorders and there are 21 surveys conducted on people’s experiences on cognitive-behavioural therapy. The partakers in the two sections are different people. The results show that people with sleep disorders can end up in a vicious circle of sleep deprivation and in worst cases a sleep disorder can take charge of a person’s whole life. Sleep disorder can cause shame and fear of stigma. Nevertheless, someone suffering from a sleep disorder can find strength and solutions to control the difficult situation. This study proves that both nursing staff and other people have little information about difficulties in sleeping and awareness should be improved in clinical nursing. A health-care provider has an essential role in preventing someone ending up in a vicious circle of sleep deprivation and cognitive-behavioural therapy can contribute to good health. Reflection at the end of cognitive-behavioural sleep therapy course helps patients to continue their learning process. When someone is sleep deprived, it means that they have control over the situation, but when someone has a sleep disorder, that person does not have the strength to control the situation.

Kotona asuvien 70-vuotiaiden terveyden ja toimintakyvyn kehityssuunnat

Suomalainen väestö ikääntyy. Myös odotettavissa oleva elinikä pitenee. Sosiaali- ja terveyspalveluiden suunnittelemisen kannalta väestön ikääntymiseen liittyvä tärkeä kysymys on, miten terveys ja toimintakyky muuttuvat lisääntyneiden elinvuosien aikana ja uusien sukupolvien ikääntyessä. Tutkimuksen tarkoituksena oli vertailla 1920 ja 1940 syntyneiden kotona asuvien 70-vuotiaiden terveyttä ja toimintakykyä. Vertailun perusteella kuvailtiin kotona asuvien 70-vuotiaiden terveyden ja toimintakyvyn kehityssuuntia 20 vuoden aikana. Tutkimuksen aineisto on kerätty Turun vanhustutkimuksessa, jonka populaatio muodostui kaikista vuosina 1920 (n=1032) ja 1940 (n=960) syntyneistä kotona asuvista turkulaisista, kun he olivat 70-vuotiaita. Aineisto kerättiin kyselyllä, haastatteluilla ja vastaanottokäynneillä. Terveyden kehityssuuntia kuvattiin koetun terveyden, elintapojen (tupakointi, alkoholinkäyttö, BMI) ja toimintaa haittaavien oireiden kautta. Toimintakyvyn kehityssuuntia kuvattiin biopsykososiaalisesta näkökulmasta. Vuonna 1940 syntyneet 70-vuotiaat arvioivat koetun terveytensä ja toimintakykynsä paremmaksi kuin vuonna 1920 syntyneet, mutta vuonna 1920 syntyneillä oli terveellisemmät elintavat. Vuonna 1940 syntyneet käyttivät useammin alkoholia ja olivat useammin ylipainoisia verrattuna 1920 syntyneisiin. Vuonna 1920 syntyneissä raittiiden osuus oli 40 prosenttia, kun vuonna 1940 syntyneissä raittiiden osuus oli enää 17 prosenttia. Muutos oli suurempi naisten kohdalla. Naisten tupakointi oli lisääntynyt (10 %), mutta sen sijaan miehet olivat vähentäneet tupakointia (17 %). Kotona asuvien 70-vuotiaiden elintapojen negatiivinen kehityssuunta on huolestuttava, vaikka koetun terveyden ja toimintakyvyn kehityssuunnat olivat positiivisia. Tuloksien perusteella ikääntyneille suunnattujen palveluiden suunnittelussa tulisi ottaa paremmin huomioon terveellisiin elintapoihin tukeminen ja kokonaisuudessaan terveyden edistäminen. Jatkossa tarvitaan lisää tutkimusta siitä, muuttuvatko terveys ja toimintakyky vielä myöhemmällä iällä.

Säröiseksi kerrottu Suomi

Kirjallisuusarvostelu

Puhuttelevia katseita modernisoituva yhteiskunnan varjoihin

Kirjallisuusarvostelu

Suuri vaiettu työsarka

Aikuiskoulutus vuonna 2025.

Critical elements underpinning the emergence of the medical game ecosystem:gamifying traumatic brain injury rehabilitation in Finland

The healthcare sector is currently in the verge of a reform and thus, the medical game research provide an interesting area of research. The aim of this study is to explore the critical elements underpinning the emergence of the medical game ecosystem with three sub-objectives: (1) to seek who are the key actors involved in the medical game ecosystem and identify their needs, (2) to scrutinise what types of resources are required in medical game development and what types of relationships are needed to secure those resources, and (3) to identify the existing institutions (‘the rules of the game’) affecting the emergence of the medical game ecosystem. The theoretical background consists of service ecosystems literature. The empirical study conducted is based on the semi-structured theme interviews of 25 experts in three relevant fields: games and technology, health and funding. The data was analysed through a theoretical framework that was designed based upon service ecosystems literature. The study proposes that the key actors are divided into five groups: medical game companies, customers, funders, regulatory parties and complementors. Their needs are linked to improving patient motivation and enhancing the healthcare processes resulting in lower costs. Several types of resources, especially skills and knowledge, are required to create a medical game. To gain access to those resources, medical game companies need to build complex networks of relationships. Proficiency in managing those value networks is crucial. In addition, the company should take into account the underlying institutions in the healthcare sector affecting the medical game ecosystem. Three crucial institutions were identified: validation, lack of innovation supporting structures in healthcare and the rising consumerisation. Based on the findings, medical games cannot be made in isolation. A developmental trajectory model of the emerging medical game ecosystem was created based on the empirical data. The relevancy of relationships and resources is dependent on the trajectory that the medical game company at that time resides. Furthermore, creating an official and documented database for clinically validated medical games was proposed to establish the medical game market and ensure an adequate status for the effective medical games. Finally, ecosystems approach provides interesting future opportunities for research on medical game ecosystems

Promoting Healthy Lifestyles with Personalized, APOE Genotype Based Health Information: The Effects on Psychological-, Health Behavioral and Clinical Factors

There is an increasing demand for individualized, genotype-based health advice. The general population-based dietary recommendations do not always motivate people to change their life-style, and partly following this, cardiovascular diseases (CVD) are a major cause of death in worldwide. Using genotype-based nutrition and health information (e.g. nutrigenetics) in health education is a relatively new approach, although genetic variation is known to cause individual differences in response to dietary factors. Response to changes in dietary fat quality varies, for example, among different APOE genotypes. Research in this field is challenging, because several non-modifiable (genetic, age, sex) and modifiable (e.g. lifestyle, dietary, physical activity) factors together and with interaction affect the risk of life-style related diseases (e.g. CVD). The other challenge is the psychological factors (e.g. anxiety, threat, stress, motivation, attitude), which also have an effect on health behavior. The genotype-based information is always a very sensitive topic, because it can also cause some negative consequences and feelings (e.g. depression, increased anxiety). The aim of this series of studies was firstly to study how individual, genotype-based health information affects an individual’s health form three aspects, and secondly whether this could be one method in the future to prevent lifestyle-related diseases, such as CVD. The first study concentrated on the psychological effects; the focus of the second study was on health behavior effects, and the third study concentrated on clinical effects. In the fourth study of this series, the focus was on all these three aspects and their associations with each other. The genetic risk and health information was the APOE gene and its effects on CVD. To study the effect of APOE genotype-based health information in prevention of CVD, a total of 151 volunteers attended the baseline assessments (T0), of which 122 healthy adults (aged 20 – 67 y) passed the inclusion criteria and started the one-year intervention. The participants (n = 122) were randomized into a control group (n = 61) and an intervention group (n = 61). There were 21 participants in the intervention Ɛ4+ group (including APOE genotypes 3/4 and 4/4) and 40 participants in the intervention Ɛ4- group (including APOE genotypes 2/3 and 3/3). The control group included 61 participants (including APOE genotypes 3/4, 4/4, 2/3, 3/3 and 2/2). The baseline (T0) and follow-up assessments (T1, T2, T3) included detailed measurements of psychological (threat and anxiety experience, stage of change), and behavioral (dietary fat quality, consumption of vegetables, - high fat/sugar foods and –alcohol, physical activity and health and taste attitudes) and clinical factors (total-, LDL- HDL cholesterol, triglycerides, blood pressure, blood glucose (0h and 2h), body mass index, waist circumference and body fat percentage). During the intervention six different communication sessions (lectures on healthy lifestyle and nutrigenomics, health messages by mail, and personal discussion with the doctor) were arranged. The intervention groups (Ɛ4+ and Ɛ4-) received their APOE genotype information and health message at the beginning of the intervention. The control group received their APOE genotype information after the intervention. For the analyses in this dissertation, the results for 106/107 participants were analyzed. In the intervention, there were 16 participants in the high-risk (Ɛ4+) group and 35 in the low-risk (Ɛ4-) group. The control group had 55 participants in studies III-IV and 56 participants in studies I-II. The intervention had both short-term (≤ 6 months) and long-term (12 months) effects on health behavior and clinical factors. The short-term effects were found in dietary fat quality and waist circumference. Dietary fat quality improved more in the Ɛ4+ group than the Ɛ4- and the control groups as the personal, genotype-based health information and waist circumference lowered more in the Ɛ4+ group compared with the control group. Both these changes differed significantly between the Ɛ4+ and control groups (p<0.05). A long-term effect was found in triglyceride values (p<0.05), which lowered more in Ɛ4+ compared with the control group during the intervention. Short-term effects were also found in the threat experience, which increased mostly in the Ɛ4+ group after the genetic feedback (p<0.05), but it decreased after 12 months, although remaining at a higher level compared to the baseline (T0). In addition, Study IV found that changes in the psychological factors (anxiety and threat experience, motivation), health and taste attitudes, and health behaviors (dietary, alcohol consumption, and physical activity) did not directly explain the changes in triglyceride values and waist circumference. However, change caused by a threat experience may have affected the change in triglycerides through total- and HDL cholesterol. In conclusion, this dissertation study has given some indications that individual, genotypebased health information could be one potential option in the future to prevent lifestyle-related diseases in public health care. The results of this study imply that personal genetic information, based on APOE, may have positive effects on dietary fat quality and some cardiovascular risk markers (e.g., improvement in triglyceride values and waist circumference). This study also suggests that psychological factors (e.g. anxiety and threat experience) may not be an obstacle for healthy people to use genotype-based health information to promote healthy lifestyles. However, even in the case of very personal health information, in order to achieve a permanent health behavior change, it is important to include attitudes and other psychological factors (e.g. motivation), as well as intensive repetition and a longer intervention duration. This research will serve as a basis for future studies and its information can be used to develop targeted interventions, including health information based on genotyping that would aim at preventing lifestyle diseases. People’s interest in personalized health advices has increased, while also the costs of genetic screening have decreased. Therefore, generally speaking, it can be assumed that genetic screening as a part of the prevention of lifestyle-related diseases may become more common in the future. In consequence, more research is required about how to make genetic screening a practical tool in public health care, and how to efficiently achieve long-term changes.

Synnytyksen ponnistusvaiheen hoidon käytännöt. Yhteys ensisynnyttäjän välilihan kuntoon synnytyksen jälkeen, synnytyskokemukseen, kipuun ja seksuaaliterveyteen

Hyvän syntymän hoidon tavoitteena on turvata synnyttäjän paras mahdollinen terveys, vähentää tarpeetonta puuttumista synnytyksen kulkuun ja mahdollistaa voimaannuttava synnytyskokemus perheelle. Hyvä syntymän hoito ja siihen liittyvä kätilöiden kliinisen hoitotyön osaaminen ei voi kehittyä, ellei hoitotyön käytäntöjä tutkita. Suomalaista hoitotieteellistä syntymän hoitoon liittyvää tutkimusta on vähän. Tämän tutkimuksen tarkoituksena oli kuvata synnytyksen ponnistusvaiheen hoidon käytäntöjä Suomen synnytyssairaaloissa. Lisäksi seurantatutkimuksen avulla selvitettiin, miten ensisynnyttäjät kokivat synnytyksen ponnistusvaiheen, sen aikana saamansa hoidon, ensisynnyttäjien synnytyskokemusta, kivun kokemista, vointia kolmena päivänä synnytyksen jälkeen sekä heidän seksuaaliterveyttään ensimmäisen vuoden aikana synnytyksen jälkeen. Tutkimuksen tavoitteena oli tuottaa tietoa, jonka avulla voidaan kehittää synnytyksen ponnistusvaiheen hoitoa ja lisätä tietoa synnyttäneiden naisten voinnista ja seksuaaliterveydestä. Tutkimuksen ensimmäinen osio toteutettiin poikkileikkaustutkimuksena (2009), johon osallistui Suomen synnytyssairaaloiden synnytysosastoilla työskentelevät kätilöt (N = 662). Tutkimuksen toinen osio toteutettiin seurantatutkimuksena (2009−2011), jossa oli neljä mittausajankohtaa: kolmantena päivänä synnytyksestä sekä kolmen, kuuden ja kahdentoista kuukauden kuluttua synnytyksestä. Tähän osioon osallistui spontaanisti alateitse yhden elävän lapsen (pää tarjoutuvana) synnyttäneet ensisynnyttäjät (N = 453) ja sikiön perätilan vuoksi suunnitellusti keisarileikatut ensisynnyttäjät (N = 84). Aineisto analysoitiin tilastollisin menetelmin. Tutkimustulosten mukaan osa kätilöiden käyttämistä synnytyksen ponnistusvaiheen hoitokäytännöistä ei ole näyttöön perustuvia. Synnytyssairaalan synnytyksen hoidon kulttuuri näyttää siirtyvän mallioppimisen kautta. Ensisynnyttäjät kokivat synnytyksen ponnistusvaiheen hoidon pääsääntöisesti myönteisenä. Alateitse synnyttäneillä ensisynnyttäjillä oli myönteisempi synnytyskokemus ja vähemmän kipua heti synnytyksen jälkeen ja kolmena synnytyksen jälkeisenä päivänä verrattuna keisarileikkauksella synnyttäneisiin ensisynnyttäjiin. Alateitse synnyttäneillä ensisynnyttäjillä kipu ja ompeleet eivät vaikuttaneet haitallisesti vastasyntyneen hoitoon tai imetykseen niin paljon kuin keisarileikkauksella synnyttäneillä ensisynnyttäjillä. Välilihan leikkaus-, repeämä- tai keisarileikkaushaavat olivat täysin parantuneet suurimmalla osalla naisista kolmen kuukauden kuluttua synnytyksestä. Yleisimpiä naisten kokemia oireita ensimmäisen vuoden aikana synnytyksestä olivat emättimen kostumisen vaikeus, yhdyntäkivut, peräpukamat sekä arpikudoksen kipu ja kiristys. Sukupuolinen halukkuus ja tyytyväisyys seksielämään olivat huonompaa ensimmäisen vuoden aikana synnytyksestä verrattuna aikaan ennen raskautta ja synnytystä. Synnytyksen aikaisella hoitotyöllä ja näyttöön perustuvalla synnytyksen ponnistusvaiheen hoidolla on suuri merkitys naisen synnytyskokemukseen, synnytyksen jälkeiseen vointiin ja seksuaaliterveyteen.

Causal relationship between obesity and vitamin D status: bi-directional mendelian randomization analysis of multiple cohorts

BACKGROUND: Obesity is associated with vitamin D deficiency, and both are areas of active public health concern. We explored the causality and direction of the relationship between body mass index (BMI) and 25-hydroxyvitamin D [25(OH)D] using genetic markers as instrumental variables (IVs) in bi-directional Mendelian randomization (MR) analysis. METHODS AND FINDINGS: We used information from 21 adult cohorts (up to 42,024 participants) with 12 BMI-related SNPs (combined in an allelic score) to produce an instrument for BMI and four SNPs associated with 25(OH)D (combined in two allelic scores, separately for genes encoding its synthesis or metabolism) as an instrument for vitamin D. Regression estimates for the IVs (allele scores) were generated within-study and pooled by meta-analysis to generate summary effects. Associations between vitamin D scores and BMI were confirmed in the Genetic Investigation of Anthropometric Traits (GIANT) consortium (n = 123,864). Each 1 kg/m(2) higher BMI was associated with 1.15% lower 25(OH)D (p = 6.52×10⁻²⁷). The BMI allele score was associated both with BMI (p = 6.30×10⁻⁶²) and 25(OH)D (-0.06% [95% CI -0.10 to -0.02], p = 0.004) in the cohorts that underwent meta-analysis. The two vitamin D allele scores were strongly associated with 25(OH)D (p≤8.07×10⁻⁵⁷ for both scores) but not with BMI (synthesis score, p = 0.88; metabolism score, p = 0.08) in the meta-analysis. A 10% higher genetically instrumented BMI was associated with 4.2% lower 25(OH)D concentrations (IV ratio: -4.2 [95% CI -7.1 to -1.3], p = 0.005). No association was seen for genetically instrumented 25(OH)D with BMI, a finding that was confirmed using data from the GIANT consortium (p≥0.57 for both vitamin D scores). CONCLUSIONS: On the basis of a bi-directional genetic approach that limits confounding, our study suggests that a higher BMI leads to lower 25(OH)D, while any effects of lower 25(OH)D increasing BMI are likely to be small. Population level interventions to reduce BMI are expected to decrease the prevalence of vitamin D deficiency.

Six new loci associated with body mass index highlight a neuronal influence on body weight regulation

Common variants at only two loci, FTO and MC4R, have been reproducibly associated with body mass index (BMI) in humans. To identify additional loci, we conducted meta-analysis of 15 genome-wide association studies for BMI (n > 32,000) and followed up top signals in 14 additional cohorts (n > 59,000). We strongly confirm FTO and MC4R and identify six additional loci (P < 5 x 10(-8)): TMEM18, KCTD15, GNPDA2, SH2B1, MTCH2 and NEGR1 (where a 45-kb deletion polymorphism is a candidate causal variant). Several of the likely causal genes are highly expressed or known to act in the central nervous system (CNS), emphasizing, as in rare monogenic forms of obesity, the role of the CNS in predisposition to obesity.

Association of vitamin D status with arterial blood pressure and hypertension risk: a mendelian randomisation study

BACKGROUND: Low plasma 25-hydroxyvitamin D (25[OH]D) concentration is associated with high arterial blood pressure and hypertension risk, but whether this association is causal is unknown. We used a mendelian randomisation approach to test whether 25(OH)D concentration is causally associated with blood pressure and hypertension risk. METHODS: In this mendelian randomisation study, we generated an allele score (25[OH]D synthesis score) based on variants of genes that affect 25(OH)D synthesis or substrate availability (CYP2R1 and DHCR7), which we used as a proxy for 25(OH)D concentration. We meta-analysed data for up to 108 173 individuals from 35 studies in the D-CarDia collaboration to investigate associations between the allele score and blood pressure measurements. We complemented these analyses with previously published summary statistics from the International Consortium on Blood Pressure (ICBP), the Cohorts for Heart and Aging Research in Genomic Epidemiology (CHARGE) consortium, and the Global Blood Pressure Genetics (Global BPGen) consortium. FINDINGS: In phenotypic analyses (up to n=49 363), increased 25(OH)D concentration was associated with decreased systolic blood pressure (β per 10% increase, -0·12 mm Hg, 95% CI -0·20 to -0·04; p=0·003) and reduced odds of hypertension (odds ratio [OR] 0·98, 95% CI 0·97-0·99; p=0·0003), but not with decreased diastolic blood pressure (β per 10% increase, -0·02 mm Hg, -0·08 to 0·03; p=0·37). In meta-analyses in which we combined data from D-CarDia and the ICBP (n=146 581, after exclusion of overlapping studies), each 25(OH)D-increasing allele of the synthesis score was associated with a change of -0·10 mm Hg in systolic blood pressure (-0·21 to -0·0001; p=0·0498) and a change of -0·08 mm Hg in diastolic blood pressure (-0·15 to -0·02; p=0·01). When D-CarDia and consortia data for hypertension were meta-analysed together (n=142 255), the synthesis score was associated with a reduced odds of hypertension (OR per allele, 0·98, 0·96-0·99; p=0·001). In instrumental variable analysis, each 10% increase in genetically instrumented 25(OH)D concentration was associated with a change of -0·29 mm Hg in diastolic blood pressure (-0·52 to -0·07; p=0·01), a change of -0·37 mm Hg in systolic blood pressure (-0·73 to 0·003; p=0·052), and an 8·1% decreased odds of hypertension (OR 0·92, 0·87-0·97; p=0·002). INTERPRETATION: Increased plasma concentrations of 25(OH)D might reduce the risk of hypertension. This finding warrants further investigation in an independent, similarly powered study.