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Table 4 Factors associated with preterm birth among mothers who gave birth in Wachemo University Nigest Eleni Mohammed Memorial referral hospital, 2019 (n = 213)

From: Factors associated with preterm birth at Wachemo University Nigist Eleni Mohammed memorial hospital, southern Ethiopia: case-control study

Variable

Category

Cases n (%)

Controls n (%)

COR (95% Cl)

AOR (95% Cl)

Parity

1–2

42 (59.2)

92 (64.8)

0.69 (0.318, 1.477)*

0.89 (0.348, 2.252)

3–4

15 (21.1)

29 (20.4)

0.78 (0.309, 1.946)

0.76 (0.248, 2.342)

> = 5

14 (19.7)

21 (14.8)

1

1

Residency

Urban

36 (50.7)

103 (72.5)

0.39 (0.215, 0.705)*

0.48 (0.239, 0.962)**

Rural

35 (49.3)

39 (27.5)

1

1

History of abortion

Yes

5 (7.1%)

4 (2.8)

2.61 (0.680, 10.053)*

2.10 (0.434, 10.168)

No

66 (92.9)

138 (97.2)

1

1

History of preterm birth

Yes

4 (5.6)

1 (0.7)

8.42 (0.923, 76.775)*

7.93 (0.717, 87.776)

No

67 (94.4)

141 (99.3)

1

1

History of stillbirth

Yes

4 (5.6)

3 (2.1)

2.77 (0.602, 12.712)*

2.40 (0.365, 15.793)

No

67 (94.4)

139 (97.8)

1

1

Antenatal care

Yes

63 (88.7)

141 (99.3)

0.06 (0.007, 0.456)*

0.08 (0.008, 0.694)**

No

8 (11.3)

1 (0.7)

1

1

Labour

Spontaneous

67 (94.4)

137 (96.5)

0.61 (0.159, 2.351)*

2.85 (0.351, 23.190)

Induced

4 (5.6)

5 (3.5)

1

1

Urinary tract infection

Yes

2 (2.8)

3 (2.1)

1.34 (0.219, 8.225)*

0.41 (0.039, 4.406)

No

69 (97.2)

139 (97.9)

1

1

Diabetes mellitus

Yes

3 (4.2)

2 (1.4)

3.08 (0.504, 18.918)*

3.89 (0.541, 27.914)

No

68 (95.8)

140 (98.6)

1

1

Anemia

Yes

6 (8.5)

3 (2.1)

4.28 (1.037, 17.639)*

3. 36 (0.451, 25.07)

No

65 (91.5)

139 (97.9)

1

1

Pregnancy induced hypertension

Yes

16 (22.5)

9 (6. 3)

4.29 (1.792, 10.313)*

3.77 (1.408, 10.147)**

No

55 (77.5)

133 (93.7)

1

1

Polyhydramnios

Yes

2 (2.8)

1 (0.7)

4.09 (0. 364, 45.854)

1.14 (0.054, 23.770)

No

69 (97.2)

141 (99.3)

1

1

Antepartum hemorrhage

Yes

2 (2.8)

1 (0.7)

4.09 (0.364, 45.962)*

1.82 (0.125, 26.435)

No

69 (97.2)

141 (99.3)

1

1

Premature rupture of membranes

Yes

20 (28.2)

10 (9.0)

5.18 (2.268, 11.812)*

3.78 (1.467, 9.749)**

No

51 (71.8)

132 (91.0)

1

1

Multiple pregnancies

Yes

26 (36.6)

14 (9.9)

5.28 (2.538, 10.996)*

5.53 (2.467, 12.412)**

No

45 (63.4)

128 (90.9)

1

1

  1. * = P-value ≤ 0.30, ** = P-value < 0.05
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