Predictors of Preterm Birth among Mothers Who Gave Birth in Silte Zone Public Hospitals, Southern Ethiopia
Table 4
Bivariate and multivariable logistic regression analysis for determinants of PTB among mothers who gave birth in Silte Zone Public Hospitals, Southern Ethiopia (2019/20).
Variables and category
Case ( and %)
Control ( and %)
COR (with 95% CI)
AOR (with 95% CI)
Monthly family income (in ETB)
<1651
18 (19.8)
50 (18.2)
1
1
1651-3200
34 (37.4)
62 (22.6)
1.52 (0.77-3.01)
2.62 (0.85-8.08)
3201-5250
24 (26.4)
82 (29.9)
0.81 (0.40-1.65)
0.61 (0.19-2.02)
5251-7800
12 (13.2)
44 (16.1)
0.76 (0.33-1.75)
0.85 (0.22-3.36)
≥7801
03 (3.3)
36 (13.1)
0.23 (0.06-0.84)@
0.14 (0.02-1.03)
History of preterm birth
Yes
33 (47.1)
27 (12.9)
6.04 (3.25-11.23)@
3.51 (1.40-8.81)
No
37 (52.9)
183 (87.1)
1
1
Interpregnancy interval (months)
<24
34 (48.6)
180 (85.7)
5.67 (3.08-10.40)@
4.46 (1.95-10.21)
≥24
36 (51.4)
30 (14.3)
1
1
ANC visit in current pregnancy
<4
45 (55.6)
90 (34.2)
2.40 (1.45-3.99)@
1.19 (0.51-2.74)
≥4
36 (44.4)
173 (65.8)
1
1
Mode of delivery in current pregnancy
SVD
57 (62.6)
204 (74.5)
1
1
Assisted
09 (9.9)
32 (11.7)
1.01 (0.45-2.23)
1.54 (0.40-5.93)
CS
25 (27.5)
38 (13.9)
2.35 (1.31-4.22)@
1.29 (0.44-3.76)
History of obstetric complication in current pregnancy
Yes
54 (59.3)
66 (24.1)
4.60 (2.78-7.60)@
3.82 (1.62-9.00)
No
37 (40.7)
208 (75.9)
1
1
Maternal weight (kg)
<50
17 (18.7)
27 (9.9)
2.10 (1.09-4.07)@
2.68 (0.66-10.88)
≥50
74 (81.3)
247 (90.1)
1
1
Infant birth weight (gm)
<2500
60 (65.9)
55 (20.1)
7.71 (4.56-13.02)@
5.58 (2.39-13.03)
≥2500
31 (34.1)
219 (79.9)
1
1
Presence of birth asphyxia
Yes
41 (45.1)
52 (19)
3.50 (2.10-5.84)@
1.21 (0.45-3.30)
No
50 (54.9)
222 (81)
1
1
@Candidate variables for multivariable analysis at value ≤ 0.25. Statistically significant at in multivariable logistic regression (for value < 0.01 and <0.001). 1: reference; COR: crude odds ratio; AOR: adjusted odds ratio; CI: confidence interval.
