Table 1. Baseline characteristics of adolescents enrolled in a longitudinal study in Aurum, Rustenburg, South Africa, stratified by participant sex.
| Total | Male | Female | p-value | |
|---|---|---|---|---|
| N = 223 | N = 80 | N = 143 | ||
| Age at enrollment (median, IQR) | 17.0 (14.0–18.0) | 16.0 (14.0–19.0) | 18.0 (14.0–18.0) | 0.66 |
| Age at enrollment (years) | 0.064 | |||
| 12–16 | 96 (43.0%) | 41 (51.2%) | 55 (38.5%) | |
| 17–19 | 127 (57.0%) | 39 (48.8%) | 88 (61.5%) | |
| What language is spoken at home? | 0.092 | |||
| Tswana | 192 (86.1%) | 64 (80.0%) | 128 (89.5%) | |
| Xhosa | 16 (7.2%) | 7 (8.8%) | 9 (6.3%) | |
| Other* | 15 (6.7%) | 9 (11.3%) | 6 (4.2%) | |
| What’s the highest level of education you’ve completed? | 0.012 | |||
| Standard 7 or below | 78 (35.0%) | 37 (46.3%) | 41 (28.7%) | |
| Standard 8–10 | 142 (63.7%) | 41 (51.2%) | 101 (70.6%) | |
| Other** | 3 (1.3%) | 2 (2.5%) | 1 (0.7%) | |
| What do you do for a job? | 0.97 | |||
| Un- or self-employed∞ | 36 (16.1%) | 13 (16.3%) | 23 (16.1%) | |
| Student | 187 (83.9%) | 67 (83.8%) | 120 (83.9%) | |
| How would you describe your relationship status? | 0.12 | |||
| Single with steady partner | 103 (46.2%) | 30 (37.5%) | 73 (51.0%) | |
| Single with casual partner(s) | 14 (6.3%) | 7 (8.8%) | 7 (4.9%) | |
| Single with no partner | 106 (47.5%) | 43 (53.8%) | 63 (44.1%) | |
| Reported recreational drug use, past year | <0.001 | |||
| No | 203 (91.0%) | 65 (81.3%) | 138 (96.5%) | |
| Yes | 20 (9.0%) | 15 (18.8%) | 5 (3.5%) | |
| Reported alcohol use, past year | 0.84 | |||
| No | 90 (40.4%) | 33 (41.3%) | 57 (39.9%) | |
| Yes | 133 (59.6%) | 47 (58.8%) | 86 (60.1%) | |
| Among those who report drinking (n = 133), how frequently do you drink? | 0.55 | |||
| Less than once a month | 59 (44.4%) | 21 (44.7%) | 38 (44.2%) | |
| About once a month | 41 (30.8%) | 16 (34.0%) | 25 (29.1%) | |
| About 2–3 times a month | 27 (20.3%) | 9 (19.2%) | 18 (20.9%) | |
| Once a week | 4 (3.0%) | 0 (0%) | 4 (4.7%) | |
| More than once a week | 1 (0.8%) | 0 (0%) | 1 (1.2%) | |
| Missing | 1 (0.8%) | 1 (2.1%) | 0 (0%) | |
| Report of sexual activity, ever ǂ | 0.89 | |||
| At enrollment | 119 (53.4%) | 41 (51.2%) | 78 (54.5%) | |
| During follow up | 16 (7.2%) | 6 (7.5%) | 10 (7.0%) | |
| None reported | 88 (39.5%) | 33 (41.3%) | 55 (38.5%) | |
| Self-report of circumcision (males) | NA | |||
| No | 32 (40.0%) | 32 (40.0%) | ||
| Yes° | 46 (57.5%) | 46 (57.5%) | ||
| Missing | 2 (2.5%) | 2 (2.5%) | ||
| Self-report of previous pregnancy (females, sexually active at enrollment) | NA | |||
| No | 63 (80.8%) | 63 (80.8%) | ||
| Yes | 13 (16.7%) | 13 (16.7%) | ||
| Missing | 2 (2.6%) | 2 (2.6%) | ||
* Other languages include Tsonga (6), Sotho (3), Portuguese (2), Swati (1), Zulu (1), English (1), and Shona (1)
**Other education includes Diploma(s)/ Occupational Certificates (2), adult school (1)
∞Only one participant reported self-employment, the remainder (35) reported being unemployed and out of school
ǂ Sexual activity included report of vaginal, anal, or oral sex (see methods)
°Circumcision includes one cultural circumcision at baseline, not performed by a doctor or nurse
NA: Not applicable (only one sex reporting data)