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Table 1 Demographic and key MSAP characteristics for students in rural KwaZulu-Natal, South Africa

From: Who is sexually active? Using a multi-component sexual activity profile (MSAP) to explore, identify and describe sexually-active high-school students in rural KwaZulu-Natal, South Africa

Sample Group Variable unAdj Male % Adj%a unAdj Female % Adj% a Adjusted P
Overall (N = 2675)   N = 1252 N = 1423  
Median Age   17 years (IQR 16–18)   16 years (IQR 15–17)  
Age Range   12–28 years   13–24 years  
Age < 15 23.7 (297/1252) 25.6 41.5 (591/1423) 41.6 0.002
16–17 40.3 (505/1252) 40.4 37.7 (537/1423) 37.5 0.383
18–19 27.5 (344/1252) 26 14.9 (212/1423) 14.8 0.005
> 20 8.5 (106/1252) 8.0 5.8 (83/1423) 6.1 0.518
HIV Prev   1.4 (18/1252) 1.4 6.2 (88/1423) 6.4 < 0.001
HSV-2 Prev   3.0 (38/1252) 2.6 10.4 (148/1423) 10.7 < 0.001
Pregnancy Prev   Not applicable   3.5 (49/1412) 3.6 Not applicable
Prev Reported Preg/made pregnant   3.1 (38/1225) 3.3 10.5 (147/1405) 10.9 0.001
STI symptom   11.4 (141/1234) 12.6 7.8 (110/1402) 8.4 0.056
Sexually Active   50.0 (619/1239) 48.5 31.8 (447/1406) 31.9 0.001
Self-report sexually active (N = 1066)   N = 619 N = 447  
Median Age   17 (IQR 16–19)   17 (IQR 16–19)   
Age Range   12–28 years   13–23 years  
Age < 15 15.2 (94/619) 17.4 18.8 (84/447) 19.5 0.612
16–17 36.8 (228/619) 38.6 42.1 (188/447) 43.5 0.235
18–19 36.7 (227/619) 34.0 25.7 (115/447) 24.5 0.049
> 20 11.3 (70/619) 10.0 13.4 (60/447) 12.5 0.518
HIV Prev   1.6 (10/619) 1.8 11.4 (51/447) 10.5 < 0.001
HSV-2 Prev   3.9 (24/619) 3.6 21.0 (94/447) 21.0 < 0.001
Pregnancy   Not applicable 6.3 (28/444) 6.2 Not applicable
Prev Reported Preg/made pregnantb   49.3 (36/73) 52.4 95.7 (134/140) 95.0 < 0.001
STI symptom   14.5 (89/614) 17.3 13.5 (60/444) 14.4 0.455
Self-report not sexually active (N = 1579)   N = 620 N = 959  
Median Age   16 (IQR 15–17)   15 (IQR: 15–16)   
Age Range   13–25 years   13–24 years   
Age < 15 32.1 (199/620) 32.8 52.2 (501/959) 51.9 0.001
16–17 44.2 (274/620) 43.1 35.8 (343/959) 35.3 0.076
18–19 18.2 (113/620) 18.0 9.6 (92/959) 9.9 0.021
> 20 5.5 (34/620) 6.1 2.4 (23/959) 2.9 0.274
HIV Prev   1.3 (8/620) 1.3 3.9 (37/959) 4.2 0.001
HSV-2 Prev   2.3 (14/620) 1.9 5.6 (54/959) 5.7 0.001
Pregnancy   Not applicable   2.2 (21/951) 2.5 Not applicable
Prev Reported Preg/made pregnant   0.3 (2/613) 0.5 1.4 (13/952) 1.9 0.068
STI symptom   8.5 (52/615) 9.3 5.3 (50/950) 6.0 0.125
  1. Significant p-values ( ≤ 0.05) are set in bold
  2. aAdjusted measures were calculated based on the cluster (school)-level summaries appropriate for school-based sampling
  3. b Percentage was calculated with regard to available data. Should be interpreted with caution as the denominator changed to 73 and 140 for male and females that self-reported as sexually active
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