Table 2 The subgroup analysis and heterogeneous data of the prevalence of infectious laryngotracheitis in chickens in mainland China
Variables | Numbers of studies | Numbers of samples | Numbers of positive samples | Prevalence rate(95%CI) | Heterogeneity | ||
|---|---|---|---|---|---|---|---|
X2 | P-value | I2/% | |||||
Region | 0.10(0.08,0.12) | 3705.39 | 0.000 | 99.4 | |||
Northwest China | 12 | 102,741 | 6095 | 0.08(0.06,0.11) | 3052.91 | 0.000 | 99.6 |
South China | 6 | 3142 | 443 | 0.13(0.06,0.21) | 390.20 | 0.000 | 98.7 |
North China | 4 | 2704 | 363 | 0.11(0.04,0.17) | 92.75 | 0.000 | 96.8 |
Diagnostic techniques | 0.10(0.08,0.12) | 3705.39 | 0.000 | 99.4 | |||
Other diagnostic techniques | 7 | 95,004 | 5103 | 0.08(0.05,0.11) | 1789.34 | 0.000 | 99.7 |
AGP | 15 | 13,583 | 1798 | 0.11(0.07,0.15) | 1896.65 | 0.000 | 99.3 |
Sampling times | 0.10(0.08,0.12) | 3705.39 | 0.000 | 99.4 | |||
1981–2000 | 13 | 12,108 | 1686 | 0.12(0.08,0.17) | 1869.17 | 0.000 | 99.4 |
2000–2023 | 9 | 96,479 | 5215 | 0.07(0.04,0.09) | 1803.88 | 0.000 | 99.6 |