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Table 1 Associations of selected explanatory variables and having had sexual intercourse 12 months prior to the survey in Zambia.

From: Harmful lifestyles' clustering among sexually active in-school adolescents in Zambia

Factor Had sexual intercourse Unadjusted OR (95% CI)
  Yes, N* (%)* No, N* (%)**  
Age    
<15 52 (33.9) 500 (48.1) 1
15 41 (24.1) 293 (22.6) 1.04 (1.02–1.06)
16+ 78 (42.0) 393 (29.3) 1.40 (1.37–1.42)
Sex    
Male 110 (66.3) 541 (51.8) 1
Female 63 (33.7) 624 (48.2) 0.74 (0.73–0.75)
Number of close friends    
0 15 (8.2) 182 (15.7) 1
1 69 (36.9) 356 (28.0) 1.50 (1.47–1.54)
2 + 101 (54.9) 655 (56.2) 1.12 (110–114)
Parental supervision    
Never 35 (23.7) 207 (19.5) 1
Rarely or sometimes 70 (40.1) 453 (42.9) 1.07 (1.05–1.09)
Most of the times or always 48 (30.2) 398 (37.6) 0.82 (0.81–0.84)
Days drank alcohol past 30 days    
0 60 (44.3) 563 (67.0) 1
1 to 2 24 (22.1) 98 (13.2) 1.36 (1.33–1.39)
3+ 38 (33.5) 140 (19.8) 1.37 (1.34–1.41)
Number of time ever used marijuana    
0 95 (50.6) 870 (72.9) 1
1 to 2 51 (30.8) 172 (15.3) 1.54 (1.51–1.57)
3+ 30 (18.7) 129 (11.8) 1.21 (1.19–1.24)
Number of times ever been drunk    
0 90 (48.8) 761 (65.1) 1
1 to 2 49 (28.1) 237 (21.4) 1.10 (1.08–1.13)
3+ 42 (23.1) 141 (13.5) 1.44 (1.37–1.44)
  1. Row frequencies not adding up because of missing information
  2. * unweighted frequencies
  3. ** weighted percents