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Table 3 Demographic and pre-pubertal predictors of earlier puberty onset in males

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

   Age of puberty (years) Total+
   Online (%) Paper (%)    
   n ≤ 11 ≥ 12 P n ≤ 11 ≥ 12 P AOR 95%CI P
Age at 16-24 years 143 51.6 45.1 0.271 363 94.7 88.9 * Ref   
survey ≥ 25 years 151 48.4 54.9   32 5.3 11.1   0.64 (0.44-0.94) *
Ethnicity white 274 93.8 93.2 0.834 376 95.1 95.7 0.776    
  other 19 6.2 6.8   18 4.9 4.3   ns   
Sexuality heterosexual 207 65.8 76.5 * 363 91.7 92.6 0.744    
  gay/bisexual 86 34.2 23.5   31 8.3 7.4   1.97 (1.25-3.11) **
Number of childhood ≤ 1 190 64.0 65.4 0.797 315 80.6 78.8 0.666 ns   
illnesses§ ≥ 2 104 36.0 34.6   80 19.4 21.2     
Overweight§ no 270 91.3 92.5 0.714 347 85.9 91.0 0.116 ns   
  yes 24 8.7 7.5   46 14.1 9.0     
Father at no 54 15.8 22.9 0.129 89 25.5 21.5 0.365 ns   
home§ yes 229 84.2 77.1   288 74.5 78.5     
Days off ≤ 10 221 80.5 82.6 0.316 316 81.0 79.5 0.105 ns   
school per year§ ≥ 11 72 19.5 17.4   77 19.0 20.5     
In poorest socio- no 189 65.8 72.4 0.243 293 74.6 82.3 0.07 Ref   
economic grouping yes 86 34.2 27.6   81 25.4 17.7   1.59 (1.09-2.31) *
  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 the age of 12 years (see methods for more details). *<0.05, **<0.01, ***<0.001, ns = not significant. +Logistic regression analysis utilised all variables in table as well as data source (i.e. online or paper), AOR = Adjusted Odds Ratio, CI = Confidence Intervals.