Table 1 Prevalence rates, age of onset, and proportional persistence of common mental disorders among first year university students in South Africa (n = 1402)
| Lifetime Prevalence % (95% CI) | 12-month Prevalence % (95% CI) | 12-month Prevalence among lifetime Cases % (95%CI) | Age of Onset Median (95%CI) [IQR] | Proportional Persistence Median % (95%CI) [IQR] | |
|---|---|---|---|---|---|
| Major depressive disorder | 24.7% (22.4–27.0) | 13.6% (11.9–15.5) | 54.9% (49.5–60.2) |
15 (15–16) [13–17] |
66.7% (66.7–75.0) [33.0–89.1] |
| Generalised anxiety disorder | 22.6% (20.4–24.9) | 20.8% (18.7–23.0) | 91.8% (88.2–94.6) |
16 (15–16) [13–17] |
80.0% (75.0–83.0) [60.0–100.0] |
| Bipolar spectrum disorder | 1.2% (0.7–1.9) | 1.0% (0.5–1.7) | 81.3% (54.4–96.0) |
16 (14–18) [14–18] |
89.0% (67.0–100.0) [67.0–100.0] |
| Alcohol use disorder | 6.1% (4.9–7.5) | 5.6% (4.5–6.9) | 86.% (73.7–94.3) |
15 (15–16) [14–16] |
75.0% (75.0–89.0) [67.0–100.0] |
| Substance use disorder | 4.8% (3.7–6.1) | 3.1% (2.3–4.2) | 64.2% (51.5–75.5) |
16 (16–18) [15–18] |
67.0% (50.0–88.0) [40.0–100.0] |