Table 3

Antenatal and delivery characteristics of the 2,032a public and private deliveries that were individually matched on the propensity score of maternal demographics
Publicly insured women Privately insured women Degrees of
(n = 1,016) (n = 1,016) freedom p-valueb
Antenatal risk factors n (%) n (%)
Threatened abortion (<20 weeks) 63 (6.2) 96 (9.5) 1 0.006
Threatened preterm labour (<37w) 157 (15.5) 116 (11.4) 1 0.008
Urinary tract infection 41 (4.0) 28 (2.8) 1 0.11
Pre-eclampsia 76 (7.5) 153 (15.1) 1 <0.0001
Placenta praevia 15 (1.5) 40 (3.9) 1 0.0006
Placental abruption 24 (2.4) 23 (2.3) 1 0.88
Pre-labour rupture of membranes 259 (25.5) 183 (18.0) 1 <0.0001
Gestational diabetes 63 (6.2) 48 (4.7) 1 0.14
Gestation (weeks)
 32 9 (0.9) 21 (2.1)
 33 13 (1.3) 30 (3.0)
 34 43 (4.2) 145 (14.3)
 35 206 (20.3) 231 (22.7)
 36 745 (73.3) 589 (58.0) 4 <0.0001
Mode of delivery
 Unassisted vaginal 551 (54.2) 358 (35.2)
 Assisted vaginal 114 (11.2) 142 (14.0)
 Caesarean section in labour 196 (19.3) 192 (18.9)
 Pre-labour caesarean section 155 (15.3) 324 (31.9) 3 <0.0001
Mean (±SD) Mean (±SD)
Infant weight (g) 2,764.6 (471.1) 2,687.4 (471.1) 0.0002

a Restricted to singleton, pre-term births (32–36 weeks), in non-tertiary hospitals, resulting in live-born infants without birth defects.

b ttest for means and Chi square test of independence for proportions.

c Only deliveries with labour.

Einarsdóttir et al.

Einarsdóttir et al. BMC Health Services Research 2013 13:40   doi:10.1186/1472-6963-13-40

Open Data