Table 4.
Mean and SD 25(OH)D at T1 and T3, and according to season at sampling.
| 25(OH)D T1 | 25(OH)D T3 | |||||
|---|---|---|---|---|---|---|
| Season | N | Mean nmol/L | SD | N | Mean nmol/L | SD |
| December–February | 43 | 64 | 27 | 344 | 62 | 28 |
| March–May | 825 | 58 * | 25 | 633 | 63 * | 28 |
| June–August | 77 | 70 * | 21 | 280 | 99 * | 37 |
| September–November | 1040 | 69 * | 24 | 579 | 83 * | 34 |
| Overall | 1985 | 65 | 25 | 1836 | 75 | 34 |
SD, standard deviation; 25(OH)D, 25-hydroxyvitamin D; T1, first trimester; T3, third trimester; * p < 0.05 independent samples t-test comparing mean 25(OH)D at T1 with mean 25(OH)D at T3, stratified by season.