Table 1.
Characteristics of participants
| (A) Clinical variables | ||||
|---|---|---|---|---|
| Boys | Girls | Total | p Value | |
| Number of participants | 732 (51) | 710 (49) | 1442 | |
| Number of examinations | 897 (49) | 929 (51) | 1826 | |
| Gestational age (week) | 38.7 (2.3) | 38.7 (2.3) | 0.34 | |
| Range | 37.0–41.9 | 37.0–41.7 | ||
| Birth weight (g) | 2990 (479) | 2890 (448) | ||
| Range | 2280–3870 | 2225–3815 | ||
| Birth height (cm) | 48.3 (2.6) | 47.5 (2.6) | ||
| Range | 42.8–53.2 | 43.1–52.7 | ||
| Parturient number | ||||
| Primipara | 343 (50) | 341 (50) | 684 | |
| Multipara | 389 (51) | 369 (49) | 758 | 0.66 |
| Delivery style | ||||
| Vaginal | 424 (50) | 419 (50) | 843 | |
| Caesarean | 308 (51) | 291 (49) | 599 | 0.67 |
| (B) Examination profile | |||
|---|---|---|---|
| Times of Examinations | Boys | Girls | Total |
| 1 | 600 | 559 | 1159 |
| 2 | 103 | 104 | 207 |
| 3 | 25 | 33 | 58 |
| 4 | 4 | 9 | 13 |
| 5 | 0 | 3 | 3 |
| 6 | 0 | 2 | 2 |
| (C) Event occurrences and duration of observation | ||||
|---|---|---|---|---|
| N | Minimum | Median | Maximum | |
| With event | 1204 | |||
| Boys | 633* | 7.67 | 62.60 | 167.62 |
| Girls | 571* | 16.78 | 70.01 | 161.40 |
| Without event | 238 | |||
| Boys | 99 | 2.12 | 28.85 | 148.57 |
| Girls | 139 | 4.30 | 38.88 | 137.95 |
| (D) Distribution of age at examination | |
|---|---|
| Age (hour) | Number of examinations |
| 0 to <8 | 41 |
| 8 to <16 | 60 |
| 16 to <24 | 128 |
| 24 to <32 | 244 |
| 32 to <40 | 133 |
| 40 to <48 | 132 |
| 48 to <56 | 232 |
| 56 to <64 | 121 |
| 64 to <72 | 118 |
| 72 to <80 | 192 |
| 80 to <88 | 91 |
| 88 to <96 | 61 |
| 96 to <104 | 103 |
| 104 to <112 | 61 |
| 112 to <120 | 26 |
| 120 to <144 | 58 |
| 144< | 25 |
( ), IQR; ( ), percentage.
Medians are shown at gestational age, birth weight and birth height.
Unit, number of participant.
Unit, hours; *p=0.0020.