Table 2.
Baseline characteristics by 25-hydroxy vitamin D tertiles.
| Parameters | 25-hydroxyvitamin D level (nmol/L) | P value | ||
|---|---|---|---|---|
| Values | <35.4 | 35.4-51 | >51 | |
| Numbers (%) | 26 (32.5) | 27 (33.8) | 27 (33.8) | |
| Male/Female (%) | 27.6/35.3 | 29.7/41.2 | 51.7/23.5 | .03 |
| Age (years) | 19.4 (5.1) | 20.5 (8.7) | 23.0 (8.3) | .2 |
| Body mass index (kg /m2) | 21.9 (4.7) | 22.5 (4.0) | 22.6 (3.4) | .6 |
| Diabetes Duration (years) | 8.4 (7.3) | 7.1 (6.7) | 6.5 (6.5) | .7 |
| Calcium | 2.4 (0.2) | 2.3 (0.1) | 2.3 (0.3) | .7 |
| Phosphorus | 1.3 (0.4) | 1.3 (0.3) | 1.3 (0.3) | 1.0 |
| Magnesium | 0.8 (0.1) | 0.8 (0.1) | 0.8 (0.1) | .5 |
| Parathyroid hormone | 5.7 (4.4) | 5.4 (2.7) | 6.1 (9.2) | .9 |
| Glycosylated hemoglobin | ||||
| Baseline | 9.8 (2.2) | 9.2 (2.4) | 9.2 (2.4) | .6 |
| Follow-up | 10.0 (2.1) | 9.0 (2.3) | 8.2 (2.3) | .02 |
| Change (95% CI) | -0.2 (-0.5, 0.8) | -0.2 (-1.1, 0.6) | -1.0 (-1.6, -0.5) | .04 |
| 25-hydroxyvitamin D level at follow-up (nmol/L) | 24.5 (5.5) | 44.6 (4.4) | 75.1 (17.7) | <.0001 |
Data are mean (standard deviation) or number (percent).