| Gestational stages | p valuea | Entire pregnancy | ||
---|---|---|---|---|---|
T1 | T2 | T3 | |||
Overall prevalence, % | 5.4 | 4.5 | 6.0 | 0.001 ** | 11.1 |
Prevalence of each category among women with medication use, % b | |||||
 A | 17.4 | 15.6 | 10.9 | 0.057 | 16.8 |
 B | 61.9 | 37.7 | 34.2 | < 0.001*** | 57.8 |
 C | 38.7 | 68.9 | 72.8 | < 0.001*** | 66.2 |
 D | 3.2 | 2.9 | 3.1 | 0.973 | 5.0 |
 X | 5.8 | 2.1 | 6.3 | 0.042 * | 7.5 |
 Unknown | 41.9 | 43.0 | 46.3 | 0.531 | 49.4 |
 Total number of different medications, n | 171 | 227 | 318 |  | 321 |
Number of different medications in each category, n (%) c | |||||
 A | 6 (3.5) | 7 (3.1) | 8 (2.5) | 0.814 | 8 (2.5) |
 B | 40 (23.4) | 54 (23.8) | 71 (22.3) | 0.916 | 67 (20.9) |
 C | 68 (39.8) | 87 (38.3) | 132 (41.5) | 0.753 | 123 (38.3) |
 D | 6 (3.5) | 8 (3.5) | 12 (3.8) | 0.984 | 19 (5.9) |
 X | 8 (4.7) | 3 (1.3) | 8 (2.5) | 0.117 | 12 (3.7) |
 Unknown | 43 (25.2) | 68 (30.0) | 87 (27.4) | 0.562 | 92 (28.7) |