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Cohort
  

Outcome variable

WHO2013

WHO1999

Pvalue*

OR**

Adjusted OR**


N

437

949
   
Preterm delivery, n (%)

27 (6.2)

60 (6.3)

0.934

0.98 (0.61–1.57)

NA

Birth weight (g)

3512 ± 459

3399 ± 532

< 0.001

NA

NA

Birth weight, n (%)
  
0.136

NA

NA

Infants < 4000 g

384 (87.9)

831 (87.8)
   
Infants 4000–4499 g

42 (9.6)

104 (11.0)
   
Infants ≥4500 g

11 (2.5)

11 (1.2)
   
Large for gestational age, n (%) ^{‡}

72 (16.5)

176 (18.5)

0.379

0.87 (0.65–1.18)

0.90 (0.66–1.25)

Small for gestational age, n (%) ^{‡}

14 (3.2)

37 (3.9)

0.538

0.82 (0.44–1.54)

NA

5 min Apgar < 7, n (%)

7 (1.6)

32 (3.4)

0.068

0.47 (0.21–1.08)

NA

Respiratory support, n (%)

14 (3.2)

37 (3.9)

0.519

0.81 (0.44–1.52)

NA

Birth trauma, n (%)

15 (3.4)

30 (3.2)

0.791

1.09 (0.58–2.05)

NA

Hypoglycaemia, n (%)

42 (9.6)

40 (4.2)

< 0.001

2.41 (1.54–3.78)

2.48 (1.52–4.05)

Hyperbilirubinaemia, n (%)

4 (0.9)

24 (2.5)

0.062

0.36 (0.12–1.03)

NA

Still birth/neonatal death, n (%)

1 (0.2)

2 (0.2)

1.000

NA

NA

Admission to the neonatology department, n (%)

54 (12.4)

139 (14.6)

0.272

0.83 (0.59–1.16)

0.79 (0.55–1.14)

 Abbreviations: WHO World health Organization, OR odds ratios, NA not applicable. Data are expressed as mean ± SD, or proportion of n (%)
 ^{*}Pvalues were based on Student’s unpaired ttest (nonskewed continuous variables), or chisquare test (categorical variables)
 ^{**}OR, 95% confidence intervals were derived from logistic regression models using the WHO1999 group as reference group. Multivariable adjustment included maternal age, pregestational body mass index, ethnicity and parity. Large for gestational age was adjusted for maternal age and pregestational body mass index. Only for the variables with sufficient statistical power multivariable adjustment was performed. When the statistical power was not sufficient or the outcome variable was continuous ‘NA’ was reported
 ^{‡}Corrected for sex, ethnicity, parity, and gestational age