Table 3 Bivariable and multivariable logistic regression analysis of factors associated with failed induction of labor among women undergoing induction at University of Gondar Specialized Hospital, Northwest Ethiopia, 2020

Name and Label

Yes

No

COR

AOR

Age in years

  ≤ 30

105(19.3%)

439(80.7%)

1

1

  > 30

69(40.8%)

100(59.2%)

2.9(2.0,4.2)***

3.7(2.2,6.2)***

Residence

 Urban

65(14.2%)

392(85.8%)

1

1

 Rural

108(42.7%)

145(57.3%)

4.5(3.1,6.5)***

3.7(2.4,5.8)***

Parity status at time of induction

 Nulliparous

139(26.7%)

381(73.3%)

1.6(1.1,2.5)*

2.1(1.2,3.7)**

 Multiparous

35(18.1%)

158(81.9%)

1

1

Birth weight in the current pregnancy

  < 2500

54(34.4%)

103(65.6%)

2.0(1.4,2.9)***

1.5(0.9,2.5)

 2500–3999

103(20.6%)

396(79.4%)

1

1

  ≥ 4000

15(35.7%)

27(64.3%)

2.1(1.1,4.2)*

1.7(0.7,4.2)

Gestational age at the time of induction

  ≤ 37

69(27.4%)

183(72.6%)

1

 38–40

55(20.9%)

208(79.1%)

0.7(0.5,1.1)

  ≥ 41

28(18.9%)

120(81.1%)

0.6(0.4,1.0)

Pre-induction bishop score

  ≤ 5

120(37.4%)

201(62.6%)

4.3(2.9,6.3)***

3.4(2.2,5.4)***

  > 5

45(12.2%)

325(87.8%)

1

1

Duration of the latent phase

  ≤ 18 h

155(24.1%)

489(75.9%)

1

  > 18 h

10(29.4%)

24(70.6%)

1.3(0.6,2.8)

Post-term pregnancy

 No

149(27.2%)

398(72.8%)

1

1

 Yes

15(15.6%)

81(84.4%)

0.5(0.3,0.9)*

1.4(0.7,3.0)

Premature rupture of membrane

 No

93(22.4%)

322(77.6%)

1

1

 Yes

71(31.1%)

157(68.9%)

1.6(1.1,2.3)*

2.7(1.5,4.6)***

Intra-uterine growth restriction

 No

153(25.7%)

442(74.3%)

1

 Yes

11(22.9%)

37(77.1%)

0.9(0.4,1.7)

Pregnancy-induced hypertension

 No

90(20%)

359(80%)

1

1

 Yes

74(38.1%)

120(61.9%)

2.5(1.7,3.6)***

4.0(2.3,7.1)***

Diabetic Mellitus

 No

152(24.9%)

458(75.1%)

1

 Yes

12(36.4%)

21(63.6%)

1.7(0.8,3.6)

Antepartum hemorrhage

 No

132(25.6%)

384(74.4)

1

 Yes

32(25.2%)

95(74.8%)

1.0(0.6,1.5)

Oligohydramnios

 No

136(25.4%)

400(74.6%)

1

 Yes

28(26.2%)

79(73.8%)

1.0(0.7,1.7)

Polyhydramnios

 No

153(25.1%)

456(74.9%)

1

 Yes

11(32.4%)

23(67.6%)

1.4(0.7,2.9)

Method of induction

 Oxytocin infusion only

138(26%)

393(74%)

1

1

 Misoprostol only

11(30.6%)

25(69.4%)

1.3(0.6,2.6)

 ARM with oxytocin

14(15.2%)

78(84.8%)

0.5(0.3,0.9)*

0.2(0.1,0.4)***

 Balloon catheter with oxytocin

11(20.4%)

43(79.6%)

0.7(0.4,1.5)

Maximum oxytocin dose used

  ≤ 5 IU

93(26.9%)

253(73.1%)

1

 6-10 IU

33(20.9%)

125(79.1%)

0.7(0.5,1.1)

  > 10 IU

12(44.4%)

15(55.6%)

2.2(0.9,4.8)