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Table 1 Prevalence of sociodemographics, sexual initiation, age of initiation and contraceptive use of participants

From: Sexual intercourse, age of initiation and contraception among adolescents in Ireland: findings from the Health Behaviour in School-aged Children (HBSC) Ireland study

  Boys (n = 2408, 53.6%) % (n) Girls (n = 2071, 46.1%) % (n)
Age Missing n = 0 Missing n = 0
 15 years 43.8 (1055) 44.3 (918)
 16 years 34.9 (841) 36.1 (747)
 17 years 18.2 (432) 17.0 (353)
 18 years 3.1 (74) 2.6 (53)
Social Class (SES) Missing n = 421 Missing n = 280
 Low 11.9 (286) 12.7 (264)
 Middle 32.7 (787) 32.0 (663)
 High 38.0 (914) 41.7 (864)
Family affluence (FAS) Missing n = 274 Missing n = 136
 Low 9.2 (221) 10.0 (207)
 Middle 39.2 (945) 36.5 (756)
 High 40.2 (968) 46.9 (972)
Urban/Rural status Missing n = 0 Missing n = 0
 Urban 61.2 (1474) 66.8 (1383)
 Rural 38.8 (934) 33.2 (688)
Traveller status Missing n = 30 Missing n = 35
 Traveller 1.6 (38) 1.1 (23)
 Non-traveller 97.2 (2340) 97.2 (2013)
Disability/Chronic illness (D/CI) Missing n = 51 Missing n = 39
 D/CI 21.0 (506) 19.8 (410)
 No D/CI 76.9 (1851) 78.3 (1622)
Household composition Missing n = 13 Missing n = 13
 Living with both parents 74.0 (1781) 74.4 (1541)
 Not living with both parents 25.5 (613) 25.0 (517)
Sexual intercourse Missing n = 257 Missing n = 148
 Yes 25.7 (619) 21.2 (439)
 No 63.6 (1532) 71.7 (1484)
Age of initiation Boys (n = 619) % (n)
Missing n = 47
Girls (n = 439) % (n)
Missing n = 12
 11 years or younger 11.1 (69) 4.1 (18)
 12 years 3.9 (24) 3.2 (14)
 13 years 7.8 (48) 6.2 (27)
 14 years 18.3 (113) 20.7 (91)
 15 years 27.3 (169) 34.2 (150)
 16 years 18.9 (117) 23.0 (101)
 17 years or older 5.2 (32) 5.9 (26)
Early sexual initiation Missing n = 196 Missing n = 139
Early sexual initiation (ages 14–15) 45.6 (282) 54.9 (241)
Very early sexual initiation (aged < 14) 22.8 (141) 13.4 (59)
Contraception at last intercoursea
 Condom 79.0 (489) 80.0 (351)
 Pill 19.4 (120) 26.9 (118)
 Withdrawal 14.5 (90) 14.6 (64)
 No method 10.5 (60) 6.8 (27)
  1. aThese questions were not mutually exclusive and therefore do not total 100%