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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 indicators

Pregnancy-induced hypertension n = 260

Normotensive women n = 522

Unadjusted RR (95% CI)

Adjusted RR (95% CI)

Birth asphyxia

Yes

103 (39.6%)

57 (10.9%)

3.62 (2.72,4.83)

2.69 (1.91,3.80)

No

157 (60.4)

465 (89.1)

1

1

Low birth weight

Yes

98 (37.7%)

32 (6.1%)

6.14 (4.24, 8.90)

5.13 (3.36,7.84)

No

162 (62.3)

490 (93.9)

1

1

Preterm delivery

Yes

106 (40.8%)

29 (5.6%)

7.33 (5.00,10.76)

5.19 (3.37,7.99)

No

154 (59.2)

493 (94.4)

1

1

Small for gestational age at birth

Yes

95 (36.7%)

56 (10.7%)

3.41 (2.54,4.59)

3.29 (2.33,4.65)

No

164 (63.3)

466 (89.3)

1

1

Admission to NICU

Yes

75 (28.8%)

28 (5.4%)

5.37 (3.57,8.08)

5.11 (3.10,8.40)

No

185 (71.2)

494 (94.6)

1

1

Apgar Score < 7 at 1 min

Yes

106 (40.8%)

53 (10.2%)

4.01 (2.99,5.39)

2.93 (2.06,4.17)

No

106 (40.8)

53 (10.2)

1

1

Apgar Score < 7at 5 min

Yes

53 (20.4%)

18 (3.4%)

5.91 (3.53,9.88)

3.78 (2.05,6.97)

No

207 (79.6)

504 (96.6)

1

1

Stillbirth

Yes

26 (10.0%)

9 (1.7%)

5.79 (2.75,12.20)

3.46 (1.40,8.54)

No

234 (90.0)

513 (98.3)

1

1

Early neonatal death

Yes

13 (5.0%)

5 (1.0%)

5.22 (1.87,14.49)

3.22 (1.06,9.74)

No

247 (95.0)

517 (99.0)

1

1

Perinatal mortality

Yes

39 (15.0%)

13 (2.5%)

6.02 (3.27,11.08)

3.67 (1.83,7.38)

No

221 (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