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TST conversion rate by serum 25(OH)D concentrations at 6 mo1
| Serum 25(OH)D |
Total | ||||
| ≤10 ng/mL | 11–15 ng/mL | 16–20 ng/mL | >20 ng/mL | ||
| TST converted | 8 | 3 | 4 | 1 | 16 |
| Did not change | 30 | 21 | 26 | 27 | 104 |
| Total | 38 | 24 | 30 | 28 | 120 |
P-trend = 0.05 (chi-square test). TST, tuberculin skin test; 25(OH)D, 25-hydroxyvitamin D.
