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Table 1 Maternal characteristics, prevalence and crude odds ratios (OR) with 95% confidence interval (95% CI) for being born late preterm in the 2004 Pelotas Birth Cohort.

From: Late preterm birth is a risk factor for growth faltering in early childhood: a cohort study

Variables n Late preterm births % Crude OR (95% CI) p*
Family income (quintiles)     
   1 (lowest) 609 16.8 2.16 (1.53; 3.05) <0.001
   2 630 11.1 1.34 (0.93; 1.94)  
   3 656 10.4 1.24 (0.86; 1.80)  
   4 721 10.3 1.23 (0.85; 1.76)  
   5 (highest) 669 8.5 Reference  
Marital status     0.754
   Single mother 513 11.7 1.05 (0.78; 1.41)  
   With partner 2772 11.2 Reference  
Maternal skin color     0.002
   Black/mixed 857 14.2 1.45 (1.15; 1.83)  
   White 2428 10.3 Reference  
Maternal schooling (years)     0.001
   0-4 473 15.9 1.78 (1.32; 2.41)  
   5-8 1306 11.7 1.25 (0.98; 1.60)  
   ≥ 9 1473 9.6 Reference  
Maternal age (years)     0.004
   12-15 83 19.3 2.03 (1.16; 3.57)  
   16-19 530 14.7 1.47 (1.11; 1.94)  
   20-34 2216 10.5 0.89 (0.63; 1.25)  
   ≥ 35 454 9.5 Reference  
Maternal height (cm)     0.222
   < 150 194 13.9 1.30 (0.85; 1.98)  
   ≥ 150 3057 11.1 Reference  
Smoking during pregnancy     0.051
   Yes 745 13.3 1.28 (1.00; 1.63)  
   No 2540 10.7 Reference  
Type of delivery     0.365
   Caesarean section 1507 11.8 1.11 (0.89; 1.37)  
   Vaginal 1778 10.8 Reference  
  1. * Wald test