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Table 2 The association between the incidence of postpartum readmission and risk factors

From: The relationship between severe maternal morbidity and a risk of postpartum readmission among Korean women: a nationwide population-based cohort study

  

Postpartum readmission

Total

N

Hazard Ratio

95% CI

Severe maternal morbidity

 No

87,994

807

1.00

 

 Yes

2041

50

2.35

1.75–3.17

Maternal age (years)

 15–19

298

6

2.13

0.92–4.88

 20–24

4151

50

1.38

1.02–1.88

 25–29

28,212

308

1.29

1.10–1.51

 30–34

42,410

355

1.00

 

 35–39

13,170

116

1.02

0.83–1.27

 40+

1794

22

1.26

0.82–1.96

Income level

 1Q

8472

87

1.01

0.77–1.34

 2Q

13,185

132

1.00

0.78–1.27

 3Q

23,587

216

0.75

0.76–1.18

 4Q

29,342

282

1.03

0.84–1.27

 5Q

15,449

140

1.00

 

Type of insurance

 Self-employed insured

26,225

256

1.05

0.91–1.22

 Employee insured

63,527

598

1.00

 

 Medical aid

283

3

0.90

0.28–2.88

Residential area

 Rural

26,636

281

1.13

0.98–1.31

 Urban

63,399

576

1.00

 

Mode of delivery

 Spontaneous vaginal delivery

31,990

282

1.00

 

 Instrumental delivery

24,648

255

1.08

0.91–1.28

 Cesarean section delivery

33,397

320

1.01

0.86 1.20

Parity

 1 (Nulliparous)

60,081

629

1.59

1.03–2.44

 2

26,573

206

1.23

0.79–1.90

 3+

3381

22

1.00

 

Comorbidities during pregnancy

 0

73,743

676

1.00

 

 1+

16,292

181

1.07

0.91–1.27

Type of hospital

 Primary

42,542

400

1.09

0.94–1.27

 Secondary

38,200

327

1.00

 

 Tertiary

9293

130

1.55

1.19–2.02

  1. Adjusted all covariates