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Table 1 Maternal socio-demographic, health and lifestyle characteristics for whom information on diabetes status was available

From: Prevalence of gestational diabetes according to commonly used data sources: an observational study

Maternal characteristic Growing up in New Zealand (n = 6818) National Minimum Dataseta (n = 42,066)
n (%) n (%)
Age group (years)
  < 20 329 (4.8%) 2437 (5.8%)
 20–24 998 (14.6%) 7715 (18.3%)
 25–29 1666 (24.4%) 10,515 (25.0%)
 30–34 2121 (31.1%) 11,520 (27.4%)
 35–39 1419 (20.8%) 7750 (18.4%)
 40 and over 285 (4.2%) 2129 (5.1%)
Self-prioritised ethnicity
 European 3608 (53.0%) 15,054 (35.8%)
 Māori 950 (14.0%) 10,182 (24.2%)
 Pacific 1001 (14.7%) 9355 (22.2%)
 Asian 1003 (14.7%) 6498 (15.4%)
 Other 241 (3.5%) 965 (2.3%)
Socioeconomic deprivation decile
 1 to 2 (least deprived) 1099 (16.1%)  
 3 to 4 1235 (18.1%)  
 5 to 6 1168 (17.1%)  
 7 to 8 1426 (20.9%)  
 9 to 10 (most deprived) 1888 (27.7%)  
Highest level of education
 No secondary school 491 (7.2%)  
 Secondary school / NCEA 1–4 1627 (23.9%)  
 Diploma/Trade certificate / NCEA 5–6 2082 (30.5%)  
 Bachelor’s degree 1539 (22.6%)  
 Higher degree 1064 (15.6%)  
DHB of domicile
 ADHB 2423 (35.5%) 13,566 (32.2%)
 CMDHB 2526 (37.0%) 17,335 (41.2%)
 WDHB 1869 (27.4%) 11,165 (26.5%)
Parity
 First child 2852 (41.8%)  
Pregnancy planning
 Planned 4091 (60.2%)  
Pre-pregnancy BMI (kg/m2)
  < 18.5 256 (4.7%)  
 18.5–24.9 3261 (54.6%)  
 25–29.9 1349 (22.6%)  
 30 and over 1105 (18.5%)  
  1. Data are presented as number of participants and percentages unless otherwise indicated, missing values have not been included in the column %
  2. n number, ADHB Auckland District Health Board, CMDHB Counties Manukau District Health Board, WDHB Waikato District Health Board, NCEA National Certificate of Educational Achievement, DHB District Health Board, BMI Body Mass Index
  3. aData from the National Minimum Dataset for women from areas serviced by ADHB, CMDHB and WDHB for 2009 and 2010 combined to match the period and geographical area in which women were recruited to the Growing Up in New Zealand study