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Table 2 Characteristics of BMI trajectory group membership

From: Group-based developmental BMI trajectories, polycystic ovary syndrome, and gestational diabetes: a community-based longitudinal study

Characteristics MRG HRG
   RRR 95% CI P value RRR 95% CI P valuea
BMI Survey 1 (kg/m2)   1.85 (1.78–1.91) <0.001 2.92 (2.75–3.10) <0.001
Age (years)   0.85 (0.80–0.90) <0.001 0.66 (0.59–0.75) <0.001
Smoking status Ex-smoker 1.17 (0.94–1.46) 0.16 1.30 (0.83–2.05) 0.26
(ref non-smoker) Current smoker 1.19 (0.99–1.42) 0.06 1.36 (0.93–1.98) 0.11
Exercise status Low 1.27 (0.94–1.71) 0.13 0.78 (0.44–1.38) 0.39
(ref nil/sedentary) Moderate 1.13 (0.83–1.54) 0.44 0.53 (0.29–0.99) 0.05
  High 0.84 (0.62–1.14) 0.27 0.46 (0.26–0.83) 0.01
Live birth   0.95 (0.80–1.13) 0.56 0.83 (0.58–1.18) 0.30
Country of birth Asians 0.36 (0.16–0.79) 0.01 3.34 × 10–7 Not calculated
(ref all other countries)       
Income (year 2) $16,000–51,999 0.86 (0.69–1.06) 0.15 0.74 (0.49–1.12) 0.16
(ref < $15,999) ≥ $52,000 0.77 (0.58–1.02) 0.07 0.59 (0.32–1.10) 0.10
Education (ref < year 12) Trade/certificate 1.13 (0.92–1.40) 0.25 0.83 (0.53–1.32) 0.43
  University/post-graduate 0.83 (0.65–1.06) 0.13 0.62 (0.34–1.11) 0.11
  1. aCharacteristics between PCOS and non-PCOS population were compared by χ2 or t test as appropriate
  2. BMI body mass index, CI confidence interval, HRG high-rising group, MRG moderately rising group, RRR relative risk reduction