Table 2.
Study population baseline information.
| First author, year | Age (mean ± SD) | Female proportion (%) | Vitamin D level (ng/mL) | Depression (%) | ||||
|---|---|---|---|---|---|---|---|---|
| Vitamin D group | Placebo group | Vitamin D group | Placebo group | Vitamin D group | Placebo group | Vitamin D group | Placebo group | |
| Vinod Yalamanchili, 2013 | 71.8 ± 3.4 | 71.1 ± 3.7 | 100 | 100 | 30.6 ± 9.4 | 31.7 ± 11.0 | 9.8a | 13.8a |
| Sabbir T. Rahman, 2023 | 69.3 (60–84) | 69.3 (60–84) | 46 | 46 | NA | NA | NA | NA |
| Ian T. Zajac, 2020 | 70.8 ± 6.4 | 70.1 ± 5.7 | 53.8 | 51.1 | 31.1 ± 0.8 | 29.7 ± 0.8 | 0 | 0 |
| Kerrie M. Sanders, 2011 | 75.8 (72.9–79.9) | 75.8 (72.9–79.2) | 100 | 100 | NA | NA | NA | NA |
| Vinod Yalamanchili, 2018 | 66.3, 66.6 (57–90) | 66.3, 66.6 (57–90) | 100 | 100 | NA | NA | NA | NA |
| Radhika, Patil 2016 | 74.1 ± 3.0 | 73.8 ± 4.1 | 100 | 100 | 26.28 ± 6.92 | 27.44 ± 7.36 | NA | NA |
| Negin Masoudi Alavi, 2018 | 68.7 ± 7.0 | 67.0 ± 6.3 | 48.7 | 51.3 | 22.57 ± 6.2 | 21.2 ± 5.8 | 100b | 100b |
| Elisa J. de Koning, 2019 | 67.8 (65.4–71.7) | 67.3 (63.4–72.0) | 58.4 | 56.4 | 18.4 (13–22.8) | 17.6 (14.4–22.1) | 100c | 100c |
| Evangelia Zaromytidou, 2022 | 73.1 ± 7.2 | 74.0 ± 7.6 | 80 | 77.8 | 19.98 ± 6.73 | 19.85 ± 5.72 | NA | NA |
| J. C. Dumville, 2006 | 77.0 ± 5.1 | 76.7 ± 4.9 | 100 | 100 | NA | NA | NA | NA |
| Hakan Sakalli, 2012 | 69.8 ± 3.7 | 68.9 ± 2.7 | 46.6 | 50 | 20.9 ± 9.5 | 21.2 ± 7.4 | NA | NA |
aGDS-LF30, Geriatric Depression Scale Long Form 30 (0 ~ 10 = normal, 11 ~ 30 = depressed). bGDS-15, Geriatric Depression Scale 15 (0 ~ 4 = normal, 5 ~ 15 = depression). cCES-D, Center for Epidemiological Studies Depression Scale (0 ~ 15 = normal, 16 ~ 60 = depression).