From: Epidemiology of khat (Catha edulis) consumption among university students: a meta-analysis
Subgroup | Number of studies | Type of use | Estimates | Heterogeneity | |||
---|---|---|---|---|---|---|---|
Prevalence (%) | 95% Confidence interval | I2 (%) | Q(df) | P value | |||
Sex | |||||||
 Men | 12 | Current | 19.26 | 14.05–25.82 | 98.01 | 553.56(11) | P < 0001 |
 Women | 12 | Current | 6.41 | 4.12–9.82 | 91.96 | 136.78(11) | P < 0001 |
 Men | 10 | Lifetime | 31.47 | 25.73–37.84 | 96.95 | 294.79(9) | P < 0001 |
 Women | 10 | Lifetime | 11.79 | 7.53–18.01 | 95.23 | 188.52(9) | P < 0001 |
Country | |||||||
 Ethiopia | 15 | Current | 13.59 | 11.02–16.62 | 98.88 | 1243.10(14) | P < 0001 |
 Saudi Arabia | 2 | Current | 18.85 | 12.31–27.75 | 98.24 | 56.82(1) | P < 0001 |
 Yemen | 1 | Current | 13.04 | 10.26–16.44 | – | – | – |
 Ethiopia | 17 | Lifetime | 24.82 | 21.30–28.72 | 96.43 | 447.74(16) | P < 0001 |
 Saudi Arabia | 2 | Lifetime | 37.32 | 15.74–65.48 | 99.30 | 141.20(1) | P < 0001 |
 Yemen | 2 | Lifetime | 43.27 | 25.31–63.19 | 92.37 | 13.04(1) | P < 0001 |