Table 5 Comparison between women with and without a documented VAS score. Chi-squared tests were used for categorical variables and t-tests for numerical variables
Study population (N = 16,775) | Women excluded (n = 4429) | P-value | |
|---|---|---|---|
Maternal age (years) | |||
Mean [SD] | 29.7 [5.0] | 29.6 [5.4] | 0.377 |
< 25 | 2338 (14) | 740 (17) | < 0.001* |
25–35 | 12,027 (72) | 2900 (66) | |
> 35 | 2240 (13) | 638 (14) | |
Missing | 170 (1) | 151 (3) | |
Body Mass Index (kg/m2) | |||
Mean [SD] | 25.3 [4.9] | 25.8 [5.1] | < 0.001* |
< 18.5 | 379 (2) | 126 (3) | < 0.001* |
18.5–24.9 | 8722 (52) | 2041 (46) | |
25–29.9 | 4486 (27) | 1220 (28) | |
30–34.9 | 1776 (11) | 521 (12) | |
35–39.9 | 584 (3) | 184 (4) | |
> 40 | 200 (1) | 69 (2) | |
Missing | 628 (4) | 268 (6) | |
Parity | |||
Primiparas | 6632 (40) | 1491 (34) | < 0.001* |
Multiparas | 9906 (59) | 2825 (64) | |
Missing | 237 (1) | 113 (3) | |