Table 1 Demographic and obstetric characteristics among super-obese and comparison women who gave birth in Australia, 2010
From: Maternal super-obesity and perinatal outcomes in Australia: a national population-based cohort study
|  | Super-obese group (N = 370) | Comparison (N = 621) | P value | ||
|---|---|---|---|---|---|
No. | % | No. | % | ||
Age (years) | |||||
  < 25 | 60 | 16.2 | 99 | 15.9 | 1.00 |
 25–29 | 109 | 29.5 | 185 | 29.8 | |
 30–34 | 110 | 29.7 | 187 | 30.1 | |
  ≥ 35 | 91 | 24.6 | 150 | 24.2 | |
Indigenous status | |||||
 No | 341 | 92.2 | 572 | 92.1 | 0.23 |
 Yes | 17 | 4.6 | 19 | 3.1 | |
 Not stated | 12 | 3.2 | 30 | 4.8 |  |
Marital status | |||||
 Single | 71 | 19.2 | 71 | 11.4 | <0.01 |
 Married/cohabit | 277 | 74.9 | 508 | 81.8 | |
 Not stated | 22 | 5.9 | 42 | 6.8 |  |
Private health insurance | |||||
 No | 356 | 96.2 | 474 | 76.3 | <0.01 |
 Yes | 14 | 3.8 | 145 | 23.3 | |
 Not stated | 0 | 0.0 | 2 | 0.3 |  |
Smoking during pregnancy | |||||
 No | 265 | 71.6 | 484 | 77.9 | <0.01 |
 Yes | 88 | 23.8 | 100 | 16.1 | |
 Not stated | 17 | 4.6 | 37 | 6.0 |  |
Assisted reproductive technology | |||||
 No | 357 | 96.5 | 574 | 92.4 | 0.17 |
 Yes | 11 | 3.0 | 29 | 4.7 | |
 Not stated | 2 | 0.5 | 18 | 2.9 |  |
Parity | |||||
 0 | 115 | 31.1 | 251 | 40.4 | <0.01 |
 1–2 | 173 | 46.8 | 313 | 50.4 | |
 3+ | 82 | 22.2 | 57 | 9.2 | |
Multiple gestation pregnancy | |||||
 No | 362 | 97.8 | 608 | 97.9 | 0.81 |
 Yes | 8 | 2.2 | 12 | 1.9 | |
 Not stated | 0 | 0.0 | 1 | 0.2 |  |
Socio-economic statusa | |||||
 Most disadvantage 1 | 66 | 17.8 | 49 | 7.9 | <0.01 |
 2 | 68 | 18.4 | 73 | 11.8 | |
 3 | 109 | 29.5 | 121 | 19.5 | |
 4 | 80 | 21.6 | 181 | 29.1 | |
 Least disadvantage 5 | 40 | 10.8 | 191 | 30.8 | |
 Not stated | 7 | 1.9 | 6 | 1.0 |  |
Previous caesarean section (exclude primiparous) | |||||
 No | 140 | 54.9 | 250 | 67.6 | <0.01 |
 Yes | 112 | 43.9 | 115 | 31.1 | |
 Not stated | 3 | 1.2 | 5 | 1.4 |  |