Table 6.
Time trends in pregnancy related mortality rates by parity (438 hospitals in China in 2012-16)
| Variables | 2012 | 2013 | 2014 | 2015 | 2016 | P value (interaction) |
|---|---|---|---|---|---|---|
| Weighted pregnancy-related mortality rate (per 100 000 births) (No of deaths) | ||||||
| All | 7.7 (114) | 10.5 (152) | 7.6 (125) | 6.6 (105) | 7.1 (113) | - |
| Nulliparous | 5.1 (53) | 9.0 (84) | 7.0 (71) | 5.3 (46) | 5.4 (49) | |
| Multiparous | 12.0 (60) | 12.9 (68) | 8.4 (53) | 8.2 (59) | 8.7 (64) | |
| Crude relative risk (95% CI): Model 1 | ||||||
| All | 1.00 | 1.37 (1.02 to 1.84) | 0.99 (0.74 to 1.32) | 0.86 (0.64 to 1.15) | 0.91 (0.64 to 1.30) | - |
| Nulliparous | 1.00 | 1.76 (1.17 to 2.65) | 1.36 (0.90 to 2.06) | 1.02 (0.63 to 1.64) | 1.05 (0.58 to 1.9) | 0.45 |
| Multiparous | 1.00 | 1.07 (0.74 to 1.57) | 0.69 (0.47 to 1.02) | 0.68 (0.47 to 1.00) | 0.72 (0.49 to 1.06) | |
| Adjusted relative risk (95% CI): Model 3 | ||||||
| All | 1.00 | 1.33 (0.98 to 1.82) | 1.00 (0.74 to 1.36) | 0.77 (0.56 to 1.07) | 0.86 (0.61 to 1.23) | - |
| Nulliparous* | 1.00 | 1.68 (1.08 to 2.61) | 1.30 (0.83 to 2.04) | 0.87 (0.53 to 1.44) | 0.94 (0.55 to 1.63) | 0.64 |
| Multiparous* | 1.00 | 1.07 (0.72 to 1.58) | 0.78 (0.52 to 1.18) | 0.73 (0.48 to 1.12) | 0.81 (0.52 to 1.26) | |
2419 (0.04%) births and 2two deaths (0.33%) had no information on parity; deaths in women with a gestational age of ≥28 weeks (including those who did not deliver) or a birth weight of ≥1000 g.
*
Model 3 by parity without adjustment for Robson classification.