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Table 2 Association between congenital heart disease and length of hospital stay after delivery given by relative ratio (RR) and 95% confidence interval (95% CI). Denmark, 1997–2014

From: Length of hospital stay after delivery among Danish women with congenital heart disease: a register-based cohort study

  

Number of days of admission after delivery

Unadjusted

Adjustedb

na

Mean (SD)

Median (IQR)

RR

95% CI

p-value

RR

95% CI

p-value

Maternal congenital heart disease

     

< 0.001

  

< 0.001

 No

935,959

3.6 (3.7)

3 (1–4)

1 (ref)

 

1 (ref)

 

 Simple

2242

3.9 (4.4)

3 (2–5)

1.10

1.05–1.16

 

1.12

1.07–1.18

 

 Moderate

1093

4.0 (3.8)

3 (2–5)

1.13

1.06–1.20

 

1.14

1.07–1.21

 

 Complex

384

5.1 (6.7)

4 (2–5)

1.42

1.22–1.66

 

1.45

1.24–1.70

 
  1. aNumber of births in the unadjusted analysis
  2. bAdjusted for maternal age, year of delivery, parity, ethnicity, and maternal educational level