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Table 2 Multivariable analysis for effects of pre-pregnancy factors and hypertension during pregnancy (n = 220)

From: Pre-pregnancy predictors of hypertension in pregnancy among Aboriginal and Torres Strait Islander women in north Queensland, Australia; a prospective cohort study

Pre-pregnancy characteristic Unit increase Crude PR (95% confidence interval) p value PR adjusted for age and ethnicity (95% confidence interval) p value
Indigenous group      
Aboriginal - 1.00    
Torres Strait Islandera - 0.52 (0.21-1.28) 0.16   
Age “1 year” 1.00 (0.92-1.07) 0.91   
Waist circumference “1 cm” 1.02 (1.00-1.04) 0.05 1.04 (1.02-1.06) 0.001
BMI (kg/m2) “1 unit” 1.05 (1.00-1.09) 0.03 1.09 (1.04-1.14) <0.001
Alcohol intake      
Safe drinker - 1.00   1.00  
Non drinker - 1.47 (0.45-4.82) 0.52 1.38 (0.43-4.47) 0.59
Risky drinker - 1.94 (0.64-5.91) 0.24 1.79 (0.58-5.49) 0.31
Non-smoker Smoker 0.74 (0.33-1.68) 0.47 0.68 (0.30-1.55) 0.36
Enough physical activity < 30 min/day 5 days per week 0.83 (0.32-2.12) 0.69 0.78 (0.31-1.55) 0.60
Systolic blood pressure “1 mmHg” 1.05 (1.02-1.07) <0.001 1.06 (1.03-1.09) <0.001
Diastolic blood pressure “1 mmHg” 1.06 (1.03-1.10) <0.001 1.07 (1.03-1.11) <0.001
Cholesterol “1 mmol/L” 1.27 (0.88-1.83) 0.21 1.38 (0.93-2.06) 0.10
Triglycerides “1 mmol/L” 1.18 (0.96-1.46) 0.12 1.17 (0.92-1.49) 0.20
HDL cholesterol (≤ 1 = low) “1 mmol/L” 0.74 (0.13-4.22) 0.73 0.61 (0.09-3.82) 0.60
Red cell folate “1 nmol/L” 1.00 (1.00-1.01) 0.006 1.00 (1.00-1.01) 0.009
Fasting glucose “1 mmol/L” 1.06 (0.82-1.37) 0.67 1.14 (0.87-1.50) 0.33
Albumin:creatinine ratio “1 mg/mmol” 1.01 (1.00-1.02) 0.02 1.01 (1.00-1.02) 0.003
Gamma-glutamyl transferase “1 U/L” 1.01 (1.00-1.02) 0.02 1.01 (1.00-1.02) 0.003
Hyper-triglyceridemic waistb - No Yes 1.55 (0.40-5.93) 0.53 1.53 (0.39-6.01) 0.54
Metabolic syndromec - No Yes 2.63 (1.18-5.88) 0.02 3.50 (1.50-8.17) 0.004
  1. Denominators vary because of missing values.
  2. aWomen in this group self-identified as Torres Strait Islander or, as both Torres Strait Islander and Aboriginal origin.
  3. bDefined as raised triglycerides (> 2 mmol/l and waist circumference ≥ 88 cm).
  4. cDefined by International Diabetes Federation criteria as comprising waist circumference.
  5. ≥ 80 cm plus two or more of the following: raised triglycerides (≥ 1.17 mmol/l), reduced high-density lipoprotein (< 1.29 mmol/L), raised blood pressure (systolic ≥ 130 mmHg or diastolic ≥ 85 mmHg) and raised plasma glucose (≥ 5.6 mmol/L). Women with diabetes excluded.