TABLE 2.
Comparation of the incidence rates of fetal distress, small for gestational age and preterm birth
| Variables | Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | p |
|---|---|---|---|---|---|
| SBP SD [mmHg, median (range)] | 5.21 (<6.06) | 6.76 (6.60–7.46) | 8.22 (7.46–9.18) | 10.68 (≥9.18) | |
| N = 13 226 | N = 13 218 | N = 13 225 | N = 13 222 | ||
| Fetal distress, n (%) | 2500 (18.90) | 2579 (19.51) | 2666 (20.16) | 2700 (20.42) | .009 |
| Small for gestational age, n (%) | 283 (2.14) | 371 (2.81) | 327 (2.47) | 441 (3.34) | <.001 |
| Preterm birth, n (%) | 642 (4.85) | 531 (4.02) | 550 (4.16) | 679 (5.14) | <.001 |
| SBP CV [%, median (range)] | 4.66 (<5.41) | 6.05 (5.41–6.68) | 7.38 (6.68–8.24) | 9.58 (≥8.24) | |
| N = 13 222 | N = 13 224 | N = 13 222 | N = 13 223 | ||
| Fetal distress, n (%) | 2524 (19.09) | 2595 (19.62) | 2684 (20.30) | 2642 (19.98) | .081 |
| Small for gestational age, n (%) | 301 (2.28) | 343 (2.59) | 377 (2.85) | 401 (3.03) | .001 |
| Preterm birth, n (%) | 669 (5.06) | 533 (4.03) | 572 (4.33) | 628 (4.75) | <.001 |
| DBP SD [mmHg, median (range)] | 4.40 (<4.72) | 5.30 (4.72–5.88) | 6.54 (5.88–7.37) | 8.64 (≥7.37) | |
| N = 13 227 | N = 13 213 | N = 13 230 | N = 13 221 | ||
| Fetal distress, n (%) | 2330 (17.62) | 2561 (19.38) | 2741 (20.72) | 2813 (21.28) | <.001 |
| Small for gestational age, n (%) | 304 (2.30) | 317 (2.40) | 353 (2.67) | 448 (3.39) | <.001 |
| Preterm birth, n (%) | 659 (4.98) | 537 (4.06) | 542 (4.10) | 664 (5.02) | <.001 |
| DBP CV [%,median(range)] | 5.69 (<6.71) | 7.57 (6.71–8.45) | 9.45 (8.45–10.73) | 12.75 (≥10.73) | |
| N = 13 223 | N = 13 223 | N = 13 223 | N = 13 222 | ||
| Fetal distress, n (%) | 2438 (18.44) | 2525 (19.10) | 2654 (20.07) | 2828 (21.39) | <.001 |
| Small for gestational age, n (%) | 317 (2.40) | 335 (2.53) | 361 (2.73) | 409 (3.09) | .003 |
| Preterm birth, n (%) | 676 (5.11) | 549 (4.15) | 585 (4.42) | 592 (4.48) | .002 |
Abbreviations: CV, coefficient of variation; DBP, diastolic blood pressure; SBP, systolic blood pressure; SD, standard deviation.