Table 6 Multivariate linear regression analysis of factors associated with 25(OH)D concentrations in serum
From: Aqueous humor and serum 25-Hydroxyvitamin D levels in patients with cataracts
| Â | Serum 25(OH)D concentration | ||
|---|---|---|---|
Regression coefficient | 95% CI | P value | |
Sex | |||
 Female vs (ref. male) | -3.35 | (-6.85–0.15) | 0.060 |
Vitamin D supplementation | |||
 Yes vs (ref. no) | 7.8 | (0.37–15.22) | 0.040 |
Average outdoor activity time (hr/day) | |||
 2–6 (ref. <2) | 1.78 | (-1.96–5.53) | 0.347 |
 >6 (ref. <2) | 0.56 | (-4.28–5.41) | 0.818 |
Previous thyroid operation | |||
 Yes vs (ref. no) | -10.89 | (-29.89–8.1) | 0.258 |
NC | |||
 2–3 (ref. 0–1) | 3.42 | (-2.89–9.72) | 0.286 |
 4–5 (ref. 0–1) | -2.96 | (-10.32–4.41) | 0.428 |
ECC (cells/mm2) | |||
 1000–2000 vs (ref. <1000) | -11.75 | (-39.63–16.13) | 0.405 |
 >2000 vs (ref. <1000) | -11.13 | (-38.61–16.35) | 0.424 |
Central macular thickness | |||
 250–300 vs (ref. ≤250) | 1.48 | (-3.03–5.98) | 0.516 |
 >300 vs (ref. ≤250) | 2.41 | (-2.68–7.49) | 0.351 |
Axial length | |||
 >24 mm vs (ref. 20–24 mm) | -2.41 | (-6.52–1.71) | 0.250 |