Table 2.
Hazard ratios for acute renal disorders overall and by subtype, by history of pre-eclampsia (PE) and timing of delivery, Denmark, 1978-2015
| Timing of delivery | History of PE | Person years (×103) | Any acute renal disorder* | Acute kidney failure | Acute tubulointerstitial nephritis | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| No | Hazard ratio† (95% CI) | No | Hazard ratio† (95% CI) | No | Hazard ratio† (95% CI) | |||||
| Early preterm | Yes | 54.0 | 29 | 1.06 (0.72 to 1.56) | ‡ | 0.49 (0.12 to 2.02) | ‡ | 1.17 (0.78 to 1.75) | ||
| No | 449.1 | 215 | 1 (reference) | 36 | 1 (reference) | 179 | 1 (ref) | |||
| Late preterm | Yes | 90.7 | 54 | 1.33 (1.00 to 1.76) | 5 | 0.72 (0.29 to 1.78) | 49 | 1.46 (1.08 to 1.96) | ||
| No | 1027.7 | 449 | 1 (reference) | 77 | 1 (reference) | 372 | 1 (ref) | |||
| Term | Yes | 760.4 | 313 | 1.12 (1.00 to 1.28) | 59 | 1.57 (1.21 to 2.05) | 254 | 1.05 (0.93 to 1.19) | ||
| No | 17 612.6 | 6260 | 1 (reference) | 814 | 1 (reference) | 5446 | 1 (ref) | |||
| P value for homogeneity | - | - | - | 0.51 | - | 0.09 | - | 0.03 | ||
Early preterm delivery: delivery <34 weeks. Late preterm delivery: delivery 34-36 weeks. Term delivery: delivery ≥37 weeks.
*
Includes acute kidney failure and acute tubulointerstitial nephritis.
†
All hazard ratios are adjusted for maternal age (underlying time in Cox model), maternal birth year, parity, history of gestational hypertension, and history of shortest gestation.
‡
Under current Danish and European data protection laws, exact numbers cannot be given because one cell contains <5 women.