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Table 1 Demographic characteristics

From: Omega-3 fatty acids to prevent preterm birth: Australian pregnant women’s preterm birth awareness and intentions to increase omega-3 fatty acid intake

CharacteristicsAll Respondents (N = 763)Nulliparous Respondents (N = 308)Multiparous Respondents (N = 455)Australian Pregnant Women3
Age (years)1 *30 (26-34)29 (25-33)31 (27-34)30.5#
Body mass index (kg/m2)124.1 (20.8-29.0)23.7 (20.5-28.3)24.3 (21.1-29.3)25.7#
Aboriginal and/or Torres Strait Islander258 (7.6)29 (9.4)29 (6.5)4.4%
Born in Australia2613 (80.3)238 (77.3)370 (82.4)65.1%
Number of children in household1*1 (0-2)0 (0-0)1 (1-2) 
Total in household1*3 (2-4)2 (2-3)3 (3-4) 
Weeks of gestation121 (12-30)22 (12-32)21 (12-29) 
Completed high school2*671 (87.9)286 (92.9)379 (84.4)89.0%4
Completed further education2601 (84.8)252 (86.3)344 (83.7) 
Further education2:
 Trade certificate90 (15.0)44 (17.5)46 (13.4) 
 Diploma or certificate214 (35.6)80 (31.7)132 (38.4) 
 Degree235 (39.1)105 (41.7)127 (36.9) 
 Higher degree112 (18.6)49 (19.4)62 (18.0) 
 Other9 (1.5)4 (1.6)5 (1.5) 
Planned pregnancy2535 (70.1)227 (73.7)303 (67.5) 
Smoked during pregnancy2107 (14.0)38 (12.3)68 (15.1)9.7%
Expecting first child2308 (40.4)308 (40.4)N/A42.8%
State2
 Australian Capital Territory15 (2.0)5 (1.6)10 (2.2)2.1%
 New South Wales244 (32.0)87 (28.2)156 (34.7)31.4%
 Northern Territory6 (0.8)4 (1.3)2 (0.4)1.3%
 Queensland170 (22.3)67 (21.8)100 (22.3)19.9%
 South Australia59 (7.7)22 (7.1)36 (8.0)6.4%
 Tasmania23 (3.0)11 (3.6)12 (2.7)1.9%
 Victoria190 (24.9)89 (28.9)100 (22.3)25.7%
 Western Australia56 (7.3)23 (7.5)33 (7.3)11.4%
  1. 1 Median (interquartile range)
  2. 2Number of respondents (N) (% of total respondents)
  3. 3Data obtained from Australia’s mothers and babies 2016 report [10]
  4. 4Number of female students staying in school until Year 12. Data obtained from Report 4221.0, The Australian Bureau of Statistics [11]
  5. Mean Chi-square tests were performed to test for differences between categorical variables and Mann-Whitney U tests were performed for continuous variables, when comparing nulliparous and multiparous groups
  6. * P < 0.05