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Table 1 Characteristics of the study population

From: Factors associated with self-reported first sexual intercourse in Scottish adolescents

Variable Population characteristics
Categorical variables  
Gender  
   Male 52%
   Female 48%
Ethnicity  
   White 97.3%
   Non-white 2.7%
Family type  
   Natural parents 64.7%
   Natural parent + step parent 12.6%
   Single parent 21.5%
   Grand/foster parents 1.2%
Number of siblings  
   Single child 7.4%
   Not single child 92.6%
Religion  
   None 62.6%
   Christian 36.6%
   Other 1.3%
Religiosity  
   Religious 9.6%
   Not religious 90.4%
Average weekly spending money (from pocket money or work)*  
   <£10 22.6%
   £10–20 60.2%
   >£20 17.2%
Type of housing  
   Owner occupied 7.9%
   Rented/council 27.1%
   Other/don't know 15.0%
Family employment  
   Wage earner in family 87.8%
   Unemployed 4.1%
   Other non-wage earner 4.3%
   Occupation not known 3.8%
Highest family educational attainment  
   College/university 47.0%
   Highers 6.9%
   Standard grades 10.9%
   Left school age 16 14.1%
   Don't know 21.1%
Feel able to talk with parents about private matters  
   Both parents 17.9%
   Either parent 34.3%
   Neither parent 47.9%
Aspirations to continue education after age 16  
   Very likely/likely 70.5
   Unsure/unlikely/very unlikely 29.5%
Continuous variables  
Age (range 13.1–16.5 years) Mean 14 years 8 months (sd 0.6 years)
Self-esteem (range 1–4 where 1 is higher self esteem) Median score 2.0 (interquartile range (IQR) 1.8–2.5)
Parental monitoring (range 1–4 where 1 is higher parental monitoring) Median score 2.3 (IQR 1.5–2.8)
Enjoyment of school (range 1–4 where 1 is higher enjoyment of school) Median score 2.0 (IQR 1.7–2.3)