Table 1 |
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Seasonal fluctuation of the levels of vitamin D in patients with undifferentiated connective tissue disease |
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UCTD patients Summer n = 161 |
UCTD patients Winter n = 161 |
Control Summer n = 59 |
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Vitamin D insufficiency (<30 ng/mL) |
67 patients (41.6%) 21.0 ± 5.79a |
88 patients (54.3%) 18.4 ± 6.7b |
11 (18.64%) 25.0 ± 4.65c |
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Vitamin D deficiency (<10 ng/mL) |
5 (3.1%) (1 RA, 4 UCTD) |
5 (3.1%) (2 RA, 3 UCTD) |
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Significance: a-csummer-control: P = 0.14; b, cwinter-control: P = 0.016; a, bsummer-winter: P = 0.03. RA, rheumatoid arthritis; UCTD, undifferentiated connective tissue disease. |
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Zold et al. Arthritis Research & Therapy 2008 10:R123 doi:10.1186/ar2533 |
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