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Table 3 Associations between maternal risk factors and gestational diabetes mellitus in univariate analysis and multivariate analysis, applying the 2017Norwegian criteria

From: Identifying women with gestational diabetes based on maternal characteristics: an analysis of four Norwegian prospective studies

Variables Univariate analysis Model 1ª: r2 = 0.158 Model 2єr2 = 0.157
Odds ratio 95% CI P-value aOR 95% CI P-value aOR 95% CI P-value
Age (years)    0.001    0.003    0.003
  ≤ 25 1    1    1   
 25–29.9 0.76 0.52–1.14 0.191 0.90 0.57–1.41 0.651 0.86 1.20–2.58 0.495
 30–34.9 0.82 0.55–0.21 0.319 1.07 0.67–1.71 0.768 1.00 0.64–1.56 0.984
  ≥ 35 1.42 0.93–2.16 0.100 1.84 1.10–3.07 0.020 1.73 1.07–2.80 0.026
Pre-pregnancy BMI (kg/m2)    < 0.001    < 0.001    < 0.001
  ≤ 25 1    1    1   
 25–26.9 1.86 1.30–2.66 0.001 1.76 1.20–2.57 0.004 1.77 1.21–2.58 0.003
 27–29.9 2.73 1.89–3.95 < 0.001 2.60 1.75–3.87 < 0.001 2.64 1.78–3.92 < 0.001
  ≥ 30 5.97 4.31–8.26 < 0.001 4.96 3.43–7.16 < 0.001 5.12 3.56–7.35 < 0.001
non-European ethnicity 4.36 3.35–5.69 < 0.001 2.46 1.53–3.94 < 0.001 2.72 1.78–4.13 < 0.001
Parous 1.53 1.21–1.94 < 0.001 0.99 0.73–1.34 0.955    
Education       0.725    
 Higher education 1    1      
 high school education 2.07 1.59–2.71 < 0.001 1.12 0.79–1.58 0.504    
 primary or less 4.60 3.11–6.80 < 0.001 1.21 0.69–2.09 0.509    
Height (cm) 0.95 0.93–0.96 < 0.001 0.99 0.96–1.01 0.341    
Current smoker 1.66 0.89–3.11 0.112 1.29 0.65–2.56 0.454    
Cohort
 Stork Rikshospitalet 1         
 FFF 0.77 0.52–1.15 0.200       
 STORK Groruddalen 2.70 2.03–3.57 < 0.001       
 TRIP 0.41 0.26–0.64 < 0.001       
Diabetes in family* 1.88 1.40–2.53 < 0.001       
  1. Binary logistic regression was performed, 2017Norway criteria
  2. aAdjusted for age, pre-pregnancy BMI, ethnicity, parity, education, height, smoking and cohort (not shown)
  3. єAdjusted for age, pre-pregnancy BMI, ethnicity and cohort (not shown)
  4. Abbrevations: aOR adjusted odds ratio, CI confidens interval, BMI body mass index
  5. * Not measured in Fit for Delivery