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Table 1 Demographic characteristics of the intervention and control sample

From: Evaluation of the 'healthy start to pregnancy' early antenatal health promotion workshop: a randomized controlled trial

Characteristic Mean (SD, range) or percentage Mean (SD, range) or percentage Maternity hospital Population
  Intervention sample (n = 178) Usual care sample (n = 182)  
Age (years) 29.5 (5.1;18–44) 29.0 (4.7; 19–41) 29.4 (5.8)
< 20 years 2.8% 2.2% 5.0%
20-24 years 12.9% 15.9% 48.6%
25-29years 34.8% 35.2%
30-34 years 32.0% 33.5% 41.5%
35-39 years 15.2% 12.6%
≥ 40 2.2% 0.5% 5.0%
Pre-pregnancy BMI (kg/m 2) 25.4 (5.2) 24.6 (5.5) 24.7 (6.6)
Underweight (<18.5) 4.5% 6.6% 7.5%
Healthy weight (18.5-24.9) 48.3% 51.6% 55.2%
Overweight (25–29.9) 26.4% 25.3% 19.9%
Obese (≥ 30) 17.4% 14.3% 15.9%
Missing 3.4% 2.2% 1.5%
Education:    -
Did not finish high school 27.5% 30.8%  
Trade/apprenticeship/diploma 29.2% 30.2% -
Degree/higher degree 43.3% 38.5% -
Household income (gross, per year)    -
<$20,000 1.1% 1.6% -
$20,001-35000 6.2% 5.5% -
$35,001-50,000 14.6% 11.0% -
$50,001-70,000 18.5% 20.9% -
$70,001-100,000 29.8% 24.2% -
>$100,000 19.7% 25.3% -
Refused to answer 5.1% 6.6% -
Not sure 4.5% 3.3% -
Missing 0% 1.1% -
Marital status    -
Married/de facto 90.4% 93.4% -
Separated/Divorced 2.2% 0.6% -
Never Married 7.3% 5.5% -
Missing 0% 0.6% -
Employment    -
Full time work 49.4% 52.7% -
Part time/ Casual work 19.1% 23.1% -
Studying 6.2% 5.5% -
Full time home duties 15.7% 11.5% -
Unemployed 9.6% 6.6% -
Missing 0% 0.5% -
ATSI status    -
Aboriginal, but not Torres Strait Islander 0.6% 0.5% -
Neither 99.4% 98.9% -
Missing 0% 0.5% -
Gravida 2.1 (1.5) 2.0 (1.4) -
Parity 0.6 (0.9) 0.6 (0.8) -
Stage of gestationweeks 14.5 (3.0) 14.2 (3.0) -