Table 1

Baseline demographic information, sexual history and substance use

Intervention (all), n=196Intervention (engaged), n=79Control, n=468Intervention (all) versus engaged, p valueIntervention all versus control, p Value,
Mean age (years)20.520.720.30.500.42
Female (%)154 (78.6)65 (82.3)365 (78.0)0.460.97
Not born in Australia (%)21 (10.7)4 (5.1)60 (12.8)0.060.53
Aboriginal/Torres Strait Islander (%)4 (2.0)2 (2.5)14 (3.0)1.000.70
Region of residence 0.290.21
 Major city (%)147 (75.0)54 (68.4)317 (67.7)
 Inner regional (%)33 (16.8)17 (21.5)88 (18.8)
 Outer regional (%)12 (6.1)5 (6.3)43 (9.2)
 Remote (%)0 (0.0)0 (0.0)4 (0.9)
 Very remote (%)0 (0.0)0 (0.0)0 (0.0)
Occupation 0.700.42
 School (%)35 (17.9)11 (13.9)98 (20.9)
 University/tertiary (%)60 (30.6)26 (32.9)128 (27.4)
 Full time work (%)62 (31.6)27 (34.2)149 (31.8)
 Part time or casual work (%)23 (11.7)7 (8.8)37 (7.9)
 Looking for work (%)8 (40.8)3 (3.8)31 (6.6)
 Work + study (%)4 (2.0)3 (3.8)4 (0.9)
 Parenting/domestic (%)2 (1.0)1 (1.3)12 (2.6)
 Other (%)2 (1.0)1 (1.3)7 (1.5)
Sexual history
 Mean age of first intercourse (years)16.216.516.30.150.42
 Mean no. of sexual partners ever3.13.23.10.830.57
 Mean no. of sexual partners last 12 months2.01.92.00.310.88
 Use condoms always (%)41 (20.9)20 (25.3)100 (21.4)0.620.95
 Had chlamydia test in past 6 months (%)60 (30.6)26 (32.9)127 (27.1)0.490.57
 Had a previous diagnosis of chlamydia (%)26 (13.3)13 (16.5)85 (18.2)0.560.21
Substance use history
 Daily smoker past 12 months (%)37 (18.9)17 (21.5)102 (21.8)0.800.44
 Drink 5 or more standard drinks at a time (%) past 2 weeks93 (47.4)47 (59.5)201 (42.9)0.670.95
 Marijuana use (any) past month (%)30 (15.3)10 (13.9)81 (17.3)0.450.66
 Other illicit drug use (any) past month (%)23 (11.7)10 (13.9)52 (11.1)0.600.83