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Table 2 Bivariate and multivariate Poisson regression analysis on the association between PIH and adverse perinatal outcomes in Tigray regional state, Ethiopia, 2018/2019

From: Effect of pregnancy induced hypertension on adverse perinatal outcomes in Tigray regional state, Ethiopia: a prospective cohort study

Perinatal outcome indicatorsPregnancy-induced hypertension n = 260Normotensive women n = 522Unadjusted RR (95% CI)Adjusted RR (95% CI)
Birth asphyxiaYes103 (39.6%)57 (10.9%)3.62 (2.72,4.83)2.69 (1.91,3.80)
No157 (60.4)465 (89.1)11
Low birth weightYes98 (37.7%)32 (6.1%)6.14 (4.24, 8.90)5.13 (3.36,7.84)
No162 (62.3)490 (93.9)11
Preterm deliveryYes106 (40.8%)29 (5.6%)7.33 (5.00,10.76)5.19 (3.37,7.99)
No154 (59.2)493 (94.4)11
Small for gestational age at birthYes95 (36.7%)56 (10.7%)3.41 (2.54,4.59)3.29 (2.33,4.65)
No164 (63.3)466 (89.3)11
Admission to NICUYes75 (28.8%)28 (5.4%)5.37 (3.57,8.08)5.11 (3.10,8.40)
No185 (71.2)494 (94.6)11
Apgar Score < 7 at 1 minYes106 (40.8%)53 (10.2%)4.01 (2.99,5.39)2.93 (2.06,4.17)
No106 (40.8)53 (10.2)11
Apgar Score < 7at 5 minYes53 (20.4%)18 (3.4%)5.91 (3.53,9.88)3.78 (2.05,6.97)
No207 (79.6)504 (96.6)11
StillbirthYes26 (10.0%)9 (1.7%)5.79 (2.75,12.20)3.46 (1.40,8.54)
No234 (90.0)513 (98.3)11
Early neonatal deathYes13 (5.0%)5 (1.0%)5.22 (1.87,14.49)3.22 (1.06,9.74)
No247 (95.0)517 (99.0)11
Perinatal mortalityYes39 (15.0%)13 (2.5%)6.02 (3.27,11.08)3.67 (1.83,7.38)
No221 (85.0)509 (97.5)1 
  1. RR Relative Risk; *the adverse perinatal outcomes were adjusted for maternal age, wealth status, educational status, residence, gravidity, type of pregnancy and mode of delivery, anemia status, maternal undernutrition 1 = reference group