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Table 1 Demographic and pre-pubertal indicators by sample type and sex

From: Early pubertal onset and its relationship with sexual risk taking, substance use and anti-social behaviour: a preliminary cross-sectional study

   Female Male
   n Online Paper P n Online Paper P
Age at 16-24 years 840 42.0 85.6 *** 506 48.6 91.9 ***
Survey ≥ 25 years 560 58.0 14.4   183 51.4 8.1  
Ethnicity white 1339 96.6 94.8 0.100 650 93.5 95.4 0.271
  other 58 3.4 5.2   37 6.5 4.6  
Sexuality heterosexual 1276 91.7 95.5 ** 570 70.6 92.1 ***
  Lesbian/bisexual 93 8.3 4.5   117 29.4 7.9  
Number of childhood ≤ 1 949 61.6 76.6 *** 505 64.6 79.7 ***
illnesses§ ≥ 2 451 38.4 23.4   184 35.4 20.3  
Overweight§ no 1197 85.7 85.4 0.872 617 91.8 88.3 0.129
  yes 201 14.3 14.6   70 8.2 11.7  
Father at no 297 20.0 21.7 0.455 143 19.1 23.6 0.162
home§ yes 1070 80.0 78.3   517 80.9 76.4  
Days off ≤ 10 1122 82.4 80.1 0.284 546 81.4 80.3 0.699
school per year§ ≥ 11 256 17.6 19.9   130 18.6 19.7  
In poorest socio- no 916 64.0 78.0 *** 482 68.7 78.3 **
economic grouping yes 399 36.0 22.0   167 31.3 21.7  
  1. $ Socio-economic grouping is based on highest ranking parents. Lowest grouping includes those whose parents' occupation was semi-routine and routine and those who never worked or were long-term unemployed (see methods for more details). §Questions refer to childhood before menarche/puberty (see methods for more details). **<0.01, ***<0.001.