Table 5 Meta-analysis of the class attack rate among TB students
From: Tuberculosis outbreaks among students in mainland China: a systematic review and meta-analysis
Subgroup analysis | Prevalence (95% CI) | Number of studies | Heterogeneity | |
|---|---|---|---|---|
I2 (%) | p | |||
Outbreaks classified by case number | ||||
 10 or more | 30.50(25.30,36.70) | 38 | 66.00 | < 0.05 |
 Fewer than 10 | 13.40(11.10,16.20) | 23 | 2.70 | 0.42 |
Type of outbreak school | ||||
 Junior middle school | 22.10(15.30,31.90) | 5 | 14.80 | 0.32 |
 Senior middle school | 21.80(17.40,27.40) | 40 | 73.40 | < 0.05 |
 University or college | 25.00(18.30,34.10) | 16 | 64.00 | < 0.05 |
Region where the outbreak school was located | ||||
 Eastern region | 21.80(18.00,26.30) | 49 | 67.10 | < 0.05 |
 Central region | 22.00(11.70,41.30) | 5 | 79.70 | < 0.05 |
 Western region | 30.70(18.10,52.30) | 7 | 75.50 | < 0.05 |
Case-finding interval of index cases | ||||
 2 months or fewer | 22.00(17.30,28.00) | 28 | 73.40 | < 0.05 |
 More than 2 months | 22.50(17.30,29.30) | 24 | 66.20 | < 0.05 |
 Overall effect | 22.70(19.20,27.00) | 61 | 69.00 | < 0.05 |