Table 3 Kaplan–Meier failure estimate and log rank test comparison of time to first birth among reproductive age women in Ethiopia, 2016 EDHS

Region

 Northern

4827 (30.87)

3224 (66.8)

19 [16–24]

570.2

< 0.001

 Oromia

5682 (36.34)

4130 (72.7)

19 [16–22]

 SNNPR

3282 (21.00)

2192 (66.8)

20 [16–24]

 Most-urban

1042 (6.74)

474 (45.5)

26 [19–34]

 Eastern-pasto

585 (3.74)

424 (72.4)

19 [16–22]

 Western-semi Pasto

204 (1.30)

144 (70.7)

19 [16–22]

Residence

 Urban

3447 (22.12)

1769 (51.3)

23 [18–30]

916.7

< 0.001

 Rural

12,175 (77.88)

8818 (72.4)

19 [16–22]

Education

 No education

7469 (47.77)

6785 (90.9)

18 [15–21]

2545.8

< 0.001

 Primary

5475 (35.04)

2865 (52.3)

20 [17–24]

 Secondary

1802 (11.61)

593 (32.8)

26 [20–37]

 Higher

868 (5.57)

344 (39.6)

27 [21–49]

Occupation

 Not working

7799 (49.91)

5243 (67.2)

19 [16–23]

461.0

< 0.001

 Agriculture

3248 (20.77)

2522 (77.6)

19 [15–21]

 Non agricul-

4576 (29.32)

2822 (61.8)

21 [17–27]

Wealth index

 Poorest

2630 (16.82)

2060 (78.3)

19 [16–22]

903.9

< 0.001

 Poorer

2803 (17.93)

2122 (75.7)

19 [16–21]

 Middle

2968 (18.98)

2128 (71.7)

19 [16–22]

 Richer

3090 (19.76)

2089 (67.6)

19 [16–23]

 Richest

4131 (26.49)

2190 (53.0)

22 [17–30]

Contraceptive

 Ever not use

8895 (56.95)

4617 (51.9)

21 [17–26]

844.2

< 0001

 Ever use

6727 (43.05)

5970 (88.7)

19 [16–22]

Media exposure

 No

11,508 (73.63)

8342 (72.5)

19 [16–22]

576.6

< 0.001

 Yes

4115 (26.37)

2245 (54.6)

22 [17–28]

Ever married

 No

4022 (25.81)

93 (2.3)

–

3974.7

< 0.001

 Yes

11,600 (74.19)

10,494 (90.5)

19 [15–21]

Spousal age gap

 < 5 years

3326 (32.63)

2984 (89.7)

19 [16–22]

129.2

 < 0.001

 ≥ 5 years

6,867 (67.37)

6366 (92.7)

18 [15–21]

Age at first marriage

 Below age 15

3044 (26.24)

2915 (95.8)

16 [14–17]

5582.3

< 0.001

 15–17

4256 (36.69)

3890 (91.4)

18 [16–19]

 18 and above

4300 (37.07)

3689 (85.8)

22 [19–25]

Age at first sex

 < 15 years

3027 (19.36)

2860 (94.47)

15 [13–18]

 15–17 years

5062 (32.38)

4576 (90.4)

18 [16–20]

 ≥ 18 years

7546 (48.26)

3151 (41.75)

22 [19–26]

Husband-education

 No education

4750 (46.60)

4516 (95.1)

18 [15–21]

396.1

 < 0.001

 Primary

3765 (36.94)

3454 (91.7)

18 [15–21]

 Secondary

971 (9.53)

808 (83.2)

20 [16–23]

 Higher

707 (6.94)

573 (81.1)

21 [17–25]

Husband occupation

 Not working

802 (7.87)

740 (92.3)

18

256.1

0.001

 Agriculture employee

6323 (61.93)

5930 (93.9)

18

 Nonagriculture

3078 (30.20)

2681 (87.1)

19

Religion

 Orthodox

6762 (43.25)

4371 (64.6)

20

178.6

< 0.001

 Muslim

4881 (31.22)

3593 (73.6)

19

 Protestant

3662 (23.42)

2367 (64.7)

20

 Others

330 (2.11)

255 (77.1)

19

Total

15,635

10,635 (67.7)

20 [16, 24]