Table 3 Binary and Multivariable Cox regression model for predictors of exclusive breastfeeding duration among women who had 6–12 months old child in Gurage zone, South Ethiopia, 2016

Maternal education status

Illiterate

51 (17.5)

240 (82.5)

1

1

Can read and write only

43 (24.2)

135 (75.8)

1.44 (0.96-2.15)

1.07 (0.56-2.07)

Primary school first cycle

(grade 1–4)

19 (19.2)

80 (80.8)

1.12 (0.66-1.89)

0.58 (0.22-1.54)

Primary school second cycle

(grade 5–8)

21 (21.4)

77 (78.6)

1.24 (0.75-2.06)

0.85 (0.36-1.98)

Secondary school completed

19 (25.7)

55 (74.3)

1.59 (0.94-2.69)

1.24 (0.47-3.27)

Diploma certified and above

17 (43.6)

22 (56.4)

3.13 (1.81-5.41)

2.89 (1.05-7.97)**

History of ANC

No

37 (52.9)

33 (47.1)

3.36 (2.33-4.83)

2.58 (0.99-6.65)

Yes

133 (18.8)

575 (81.2)

1

1

Place of delivery

Home

30 (42.3)

41 (57.7)

1

1

Health institutions

140 (19.8)

567 (80.2)

0.40 (0.27-0.66)

0.87 (0.10-7.64)

Mode of delivery

Cesarean section

14 (43.8)

18 (56.2)

2.6 (1.5-4.5)

3.8 (2.0 - 7.2)**

Spontaneous vaginally

156 (20.9)

590 (79.1)

1

1

Breastfeeding counseling during PNC

No

14 (60.9)

9 (39.1)

5.00 (2.84-8.80)

5.1 (2.5 – 10.23)**

Yes

87 (14.5)

515 (85.5)

1

1

Perceived adequacy of breast milk

No

57 (71.2)

23 (28.8)

5.8 (4.3 – 8.1)

11.0 (6.7-18.10)**

Yes

113 (16.2)

585 (83.8)

1

1

Wealth Index

Lowest quintile

40 (25.8)

115 (74.2)

1

1

Second quintile

28 (17.9)

128 (82.1)

0.64 (0.39-1.04)

0.48 (0.23-0.98)**

Middle quintile

19 (12.2)

137 (87.8)

0.43 (0.25-0.74)

0.90 (0.40-2.04)

Fourth quintile

33 (21.2)

123 (78.8)

0.77 (0.49-1.23)

1.10 (0.50-2.45)

Fifth quintile

50 (32.2)

105 (67.7)

1.26 (0.83-1.90)

1.34 (0.64-2.80)