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Table 1 Socio-demographics of sample population and target population

From: Infant care practices and parent uptake of safe sleep messages: a cross-sectional survey in Queensland, Australia

 Survey Participants
n (%)
Target Population
n (%)
P-value*
Maternal Characteristicsn = 3341n = 10,131 
 Age, years(missing = 103)  
  < 20 years27 (0.8)354 (3.4)< 0.0001
  20–29 years1065 (32.9)4432 (43.1)
  30–39 years1982 (61.2)5066 (49.2)
  ≥ 40 years164 (5.1)435 (4.2)
 Parity(missing = 51)  
  Primiparous1496 (45.5)3079 (30.4)< 0.0001
  Multiparous1794 (55.5)7052 (69.6)
 Marital status(missing = 57)(missing = 15) 
  Partnered [married/de facto]3125 (95.2)8120 (80.3)< 0.0001
  Single [never married, separated/divorced, widowed, not stated]159 (4.8)2046 (19.7)
 Country of birth(missing = 57)(missing = 1) 
  Australia2554 (77.8)7386 (72.9)< 0.0001
  Overseas730 (22.2)2744 (27.1)
 Indigenous status(missing = 74)  
  Neither Aboriginal nor Torres Strait Islander3205 (98.1)9411 (92.9)< 0.0001
  Aboriginal and/or Torres Strait Islander62 (1.9)720 (7.1)
 Smoking status(missing = 59)(missing = 21) 
  Smoked during pregnancy135 (4.1)1216 (12.0)< 0.0001
  Smoke-free during pregnancy3147 (95.9)8894 (88.0)
Infant Characteristicsn = 3341n = 10,287 
 Sex(missing = 29)  
  Female1552 (53.1)4881 (47.4)0.41
  Male1760 (46.9)5406 (52.6)
 Birth weight, g(missing = 147)(missing = 19) 
  < 2500169 (5.3)700 (6.8)< 0.0003
  2500–34991632 (51.1)5444 (52.9)
  3500–39991012 (31.7)3078 (29.9)
  4000–4499323 (10.1)938 (9.1)
  ≥ 450058 (1.8)127 (1.2)
 Gestation(missing = 55)  
  Term ≥37 weeks3074 (93.5)9400 (91.4)< 0.0001
  Preterm < 37 weeks212 (6.5)887 (8.6)
 Plurality(missing = 74)  
  Singleton3220 (98.6)9976 (97.0)< 0.0001
  Multiple47 (1.4)311 (3.0)
 Indigenous status(missing = 61)  
  Neither Aboriginal nor Torres Strait Islander3166 (96.5)9382 (91.2)< 0.0001
  Aboriginal and/or Torres Strait Islander114 (3.5)905 (8.8)
  1. *p-value for difference between participants and target population