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Table 3 Perinatal outcomes of the 1st birth (pre-intervention)

From: Aiming to increase birth weight: a randomised trial of pre-pregnancy information, advice and counselling in inner-urban Melbourne

  Intervention N = 392 Comparison N = 394  
Birth weight    
Mean (SD), g 3296 (509) 3335 (504) Difference -39 g,
Missing data (3) (2)  
Birth weight <10thpercentile* 43 (11%) 32 (8%) OR (exact) 1.39 [0.84,2.33]
Low Birth weight    
<1000 g 0 0  
1000–1499 1 2  
1500–1999 4 4  
2000–2499 14 11  
All low birthweight 19 (4.9%) 17 (4.3%)  
  365 373  
Missing data (8) (6)  
All births 392 396  
Gestation (weeks)    
Mean (SD) 39.6 (1.7) 39.6 (1.7)  
Preterm birth (<37 weeks) 25 (6.5%) 17 (4.6%) OR (exact) 1.14 (0.56–2.34)
Preterm birth    
20–27 weeks 0 0  
28–31 weeks 1 1  
32–36 weeks 24 16  
All preterm gestations 25 (6.5%) 17 (4.6%) 'OR 1.51(0.77. 2.98)
All with gestations ≥ 37 weeks 361 371  
Missing data (6) (6)  
All gestations 392 394  
  1. *All twins excluded