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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.