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  • 1.
    Granlund, Lena
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Vitamin D deficiency in Northern Sweden: a cross-sectional study of an immigrant population at latitude 63° N, including an open partially randomized, controlled trial studying the effect of supplementation with different doses of cholecalciferol2018Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Background: Vitamin D is a prohormone that plays a key role in the calcium and phosphate balance and has physiological functions throughout the entire body. Vitamin D is supplied by exposure to ultraviolet light or by food. The prevalence of vitamin D deficiency in immigrants in Northern Sweden was unknown. There was no consensus on how to define or treat vitamin D deficiency and no pure preparations of cholecalciferol available in Sweden.

    Aims: To study the prevalence and determinants of vitamin D deficiency in immigrants of African and Middle Eastern origin, to examine associations between vitamin D status and muscle strength, anxiety, depression and quality of life, and to determine the effect of supplementation with cholecalciferol on 25-hydroxyvitamin D3 [25(OH)D] and vitamin D status.

    Methods: 1. A cross-sectional, population-based study. Immigrants ages 25-65 from Africa and the Middle East (n=1306) living in Umeå, Sweden, were invited to participate. A total of 111 men and 106 women (16.5%) participated. 25(OH)D was measured by LC-MsMs. Anthropometry, medical, socioeconomic and lifestyle data was registered. Examinations: lower limb muscle strength, grip strength, HAD, health-related quality of life (QoL) 2. An open, partially randomized, controlled trial including immigrants from Africa or the Middle East, 192 subjects screened, 160 included and 147 completed the study. Intervention: cholecalciferol 12±2 weeks, 4 parallel groups; Group 1: 25(OH)D <25nmol/L: 10000 IU/d, Groups 2a and 2b: 25(OH)D 25-49 nmol/L: 2000 IU/d or 2000 IU/w, Group 3: 25(OH)D 50-74 nmol/L: 2000 IU/d.

    Results: Twelve percent of the immigrants showed a vitamin D deficiency (25(OH)D ˂25 nmol/L) and 73 % showed 25(OH)D ˂50 nmol/L. Vitamin D deficiency was twice as common in African immigrants as in the Middle Eastern group. Vitamin D deficiency was associated with intake of fatty fish less than once a week, absence of travel abroad and use of long-sleeved clothing in summer. Lower limb muscle strength was associated with 25(OH)D levels and weaker grip strength was associated with vitamin D deficiency. Vitamin D deficiency was not associated with anxiety, depression or QoL in the total immigrant population. In Middle Eastern women, in whom prevalence of anxiety was higher, anxiety was associated with 25(OH)D ≤49 nmol/L. Oral cholecalciferol was effective in increasing 25(OH)D. At study end, 100% in Group 1, 89% in Group 2a, 55% in Group 2b and 96% in Group 3 reached adequate vitamin D status (25(OH)D ˃50 nmol/L). In Group 1; 62 % reached 25(OH)D ≥125 nmol/L.

    Conclusions: Vitamin D deficiency and insufficiency was common in the immigrant group and no difference was shown between men and women. A diet including a high intake of fatty fish was most important in avoiding vitamin D deficiency. Vitamin D status was associated with muscle strength in all immigrants. Vitamin D deficiency was not associated with anxiety, depression or QoL in the immigrants. In female immigrants from the Middle East, anxiety was associated with 25(OH)D levels ≤49 nmol/L. Supplementation with cholecalciferol 2000 IU/day for three months was safe in healthy individuals with initial 25(OH)D 25-49 nmol/L, but monitoring is warranted since 11 % did not attain sufficient vitamin D status. The dose 10 000 IU/day in patients with initial 25(OH)D <25 nmol/L was unnecessarily high.

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  • 2.
    Granlund, Lena E.
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Ramnemark, Anna
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Geriatrik.
    Andersson, Christer
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Lindkvist, Marie
    Umeå universitet, Samhällsvetenskapliga fakulteten, Handelshögskolan vid Umeå universitet, Statistik. Umeå universitet, Medicinska fakulteten, Institutionen för epidemiologi och global hälsa.
    Norberg, Margareta
    Umeå universitet, Medicinska fakulteten, Institutionen för epidemiologi och global hälsa.
    Fhärm, Eva
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Vitamin D status was not associated with anxiety, depression, or health-related quality of life in Middle Eastern and African-born immigrants in Sweden2020Ingår i: Nutrition Research, ISSN 0271-5317, E-ISSN 1879-0739, Vol. 75, s. 109-118Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Active vitamin D is a neurosteroid that may modulate brain function. Associations between vitamin D deficiency and depression and anxiety have been demonstrated. We hypothesized that there was an association between anxiety, depression, and health-related quality of life (HRQOL) and vitamin D status. To test this hypothesis, we examined the association between anxiety, depression, and HRQOL and 25-hydroxyvitamin D (25[OH]D) concentrations in the Middle Eastern and African-born immigrant population. All immigrants aged 25-65 years, born in 9 African or Middle Eastern countries, and living in 3 districts in Umea (n = 1306) were invited, with 195 English- or Swedish-speaking immigrants (104 men and 91 women) participated. Anxiety and depression were measured using the Hospital Anxiety and Depression scale. HRQOL was measured using EuroQoL-5 Dimension 3 Level Questionnaire and EuroQoL Visual Analogue Scale. Serum 25(OH)D was measured using liquid chromatography-tandem mass spectrometry. Associations were determined using logistic and linear regression. Analyses were adjusted for sex, age, origin, socioeconomic factors, lifestyle, chronic diseases, and obesity. In total, 71% had 25(OH)D less than 50 nmol/ L and 11% had 25(OH)D less than 25 nmol/L. Anxiety, depression, and HRQOL were not associated with 25(OH)D in the immigrant population. Anxiety was common in female immigrants from the Middle East (32.7%); and after adjustment, lower 25(OH)D concentrations were associated with higher risk of anxiety (25[OH]D <= 49 nmol/L vs 25[OH] D >= 50 nmol/L: odds ratio 23.2 [95% confidence interval 1.97 - 271.9] P = .012) in this subgroup only; however, reverse causality could not be excluded. In conclusion, the study showed no association between depression, anxiety, or HRQOL and vitamin D status in the immigrant population.

  • 3.
    Granlund, Lena
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Norberg, Margareta
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa.
    Ramnemark, Anna
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Geriatrik.
    Andersson, Christer
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Lindkvist, Marie
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa. Umeå universitet, Samhällsvetenskapliga fakulteten, Handelshögskolan vid Umeå universitet, Statistik.
    Fhärm, Eva
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Vitamin D is associated with lower limb muscle strength and grip strength in Middle Eastern- and African-born immigrants in Sweden2018Ingår i: Nutrition Research, ISSN 0271-5317, E-ISSN 1879-0739, Vol. 59, s. 29-35Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    There is increasing evidence that vitamin D status is associated with muscle function. Vitamin D deficiency is common in immigrants. We hypothesized that there was a positive association between vitamin D status and muscle strength in immigrants. The aim of this study was to examine associations between vitamin D status and muscle strength in an immigrant population in Sweden. All immigrants aged 25-65 years, born in 9 African or Middle East countries, and living in a district in Umeå (n = 1306) were invited. A total of 111 men and 105 women (16.5%) completed the study. Lower limb muscle strength was examined using a standardized muscle function indices of muscle strength. Grip strength was examined using a JAMAR hand dynamometer. Serum 25-hydroxyvitamin D [25(OH)D] was measured using liquid chromatography–tandem mass spectrometry. The analyses were adjusted for sex, age, height, body mass index, years since immigration, 25(OH)D, vitamin D deficiency, physical activity, and medical and socioeconomic factors. Twelve percent of the immigrants had vitamin D deficiency [25(OH)D levels <25 nmol/L]. In multivariable analyses, reduced lower limb muscle strength remained linearly associated with lower 25(OH)D concentrations (P = .008) and weaker grip strength remained associated with vitamin D deficiency (P = .022) after adjustments. The association between vitamin D deficiency and reduced lower limb muscle strength did not reach statistical significance (P = .052). The results demonstrate that vitamin D deficiency and low 25(OH)D concentrations were associated with muscle weakness in immigrants.

  • 4.
    Granlund, Lena
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Ramnemark, Anna
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Geriatrik.
    Andersson, Christer
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Lindkvist, Marie
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa. Umeå universitet, Samhällsvetenskapliga fakulteten, Handelshögskolan vid Umeå universitet, Statistik.
    Fhärm, Eva
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Norberg, Margareta
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa.
    Prevalence of vitamin D deficiency and its association with nutrition, travelling and clothing habits in an immigrant population in Northern Sweden2016Ingår i: European Journal of Clinical Nutrition, ISSN 0954-3007, E-ISSN 1476-5640, Vol. 70, nr 3, s. 373-379Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    OBJECTIVES: To study prevalence and determinants of vitamin D deficiency in immigrants from Africa and the Middle East living in Umeå, Sweden.

    DESIGN: Cross-sectional population based.

    SETTING: Umeå, Sweden (63° N).

    SUBJECTS/METHODS: Immigrants aged 25-65 years from nine countries in Africa or the Middle East (n=1306) were invited. A total of 111 men and 106 women (16.5%) completed the study. S-25-hydroxyvitamin D3 was measured with HPLC. Anthropometry, medical, socioeconomic and lifestyle data were registered.

    RESULTS: Vitamin D status was insufficient or deficient in 73% of the participants. Specifically, 12% had vitamin D deficiency (25(OH)D3<25 nmol/l), and only 3.7% had optimal vitamin D status (25(OH)D3 75-125 nmol/l). Mean 25(OH)D3 level was 41.0 nmol/l (±16.6) with no difference between sexes. Levels of 25(OH)D3 were lower (P=0.030) and vitamin D deficiency was twice as common in immigrants from Africa compared with those from the Middle East. In the multiple regression analysis, vitamin D deficiency was significantly associated with low fatty fish intake (OR 4.31, 95% CI 1.61-11.55), not travelling abroad (OR 3.76, 95% CI 1.18-11.96) and wearing long-sleeved clothes in summer (OR 3.15, 95% CI 1.09-9.12).

    CONCLUSIONS: The majority of immigrants from Africa and the Middle East who live in northern Sweden have vitamin D deficiency or insufficiency. Our results are consistent with sun exposure and a diet with high intake of fatty fish being most important in avoiding vitamin D deficiency.

  • 5.
    Granlund, Lena
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Ramnemark, Anna
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Geriatrik.
    Andersson, Christer
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Lindkvist, Marie
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa.
    Norberg, Margareta
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa.
    Fhärm, Eva
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Associations between vitamin D status and anxiety, depression and health related quality of life in an immigrant population. A cross-sectional study from SwedenManuskript (preprint) (Övrigt vetenskapligt)
  • 6.
    Norberg, Margareta
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa.
    Granlund, Lena
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Ramnemark, Anna
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Geriatrik.
    Andersson, Christer
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Fhärm, Eva
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Allmänmedicin.
    Lindkvist, Marie
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa.
    A randomised trial of vitamin D among immigrants in Sweden: response to treatment - a question of starting point and doseManuskript (preprint) (Övrigt vetenskapligt)
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