Table 3. Pooled prevalence of tuberculosis infection in dairy cattle in different provinces of China.
| Province | Region | Study No. | No. tested | No. positive | % (95% CI) | Heterogeneity | Univariate meta-regression | |||
|---|---|---|---|---|---|---|---|---|---|---|
| χ2 | P | I2 (%) | P | Coefficient (95% CI) | ||||||
| Beijing | Northern China | 5 | 26,120 | 69 | 1.5% (0.3–3.6) | 224.98 | < 0.01 | 98.2% | < 0.001 | 0.199 (0.155 to 0.243) |
| Fujian | Eastern China | 1 | 111,003 | 273 | 0.3% (0.2–0.3) | 0.00 | < 0.01 | -- | ||
| Gansu | Northwestern China | 3 | 326,765 | 183 | 0.0% (0.0–0.0) | 0.82 | < 0.01 | 0.0% | ||
| Guangdong | Southern China | 1 | 2,993 | 0 | 0.0% (0.0–0.1) | 0.00 | < 0.01 | -- | ||
| Guangxi | Southern China | 4 | 29,379 | 285 | 2.2% (0.7–4.4) | 226.36 | < 0.01 | 98.7% | ||
| Guizhou | Southwestern China | 3 | 21,778 | 51 | 3.2% (0.1–9.7) | 130.06 | < 0.01 | 98.5% | ||
| Hebei | Northern China | 2 | 2,319 | 75 | 6.7% (0.2–20.3) | 18.95 | < 0.01 | 94.7% | ||
| Heilongjiang | Northeastern China | 2 | 1,277 | 34 | 2.8% (1.6–4.2) | 1.72 | < 0.01 | 41.9% | ||
| Henan | Central China | 2 | 13,257 | 207 | 2.7% (0.4–6.7) | 30.57 | < 0.01 | 96.7% | ||
| Hubei | Central China | 1 | 7,357 | 122 | 1.7% (1.4–2.0) | 0.00 | < 0.01 | -- | ||
| Hunan | Central China | 1 | 60 | 1 | 1.7% (0.0–7.0) | 0.00 | < 0.01 | -- | ||
| Inner Mongolia | Northern China | 2 | 4,590 | 229 | 5.0% (3.9–6.2) | 3.42 | < 0.01 | 70.8% | ||
| Jiangsu | Eastern China | 4 | 916,430 | 8,034 | 1.2% (0.9–1.6) | 36.93 | < 0.01 | 91.9% | ||
| Jiangxi | Eastern China | 1 | 418 | 4 | 1.0% (0.2–2.2) | 0.00 | < 0.01 | -- | ||
| Liaoning | Northeastern China | 1 | 2,005 | 33 | 1.7% (1.1–2.3) | 0.00 | < 0.01 | -- | ||
| Ningxia | Northwestern China | 3 | 3,809 | 137 | 3.2% (2.1–4.5) | 5.85 | < 0.01 | 65.8% | ||
| Qinghai | Northwestern China | 15 | 273,761 | 409 | 0.4% (0.2–0.6) | 463.97 | < 0.01 | 97.0% | ||
| Shaanxi | Northwestern China | 5 | 14,952 | 145 | 1.3% (0.5–2.5) | 42.79 | < 0.01 | 90.7% | ||
| Shandong | Eastern China | 5 | 4,435 | 615 | 10.4% (0.6–29.3) | 970.11 | < 0.01 | 99.6% | ||
| Shanghai | Eastern China | 6 | 83,459 | 356 | 3.9% (1.3–7.6) | 676.09 | < 0.01 | 99.3% | ||
| Sichuan | Southwestern China | 4 | 34,953 | 155 | 0.5% (0.1–1.2) | 177.59 | < 0.01 | 98.3% | ||
| Xinjiang | Northwestern China | 13 | 442,973 | 2,654 | 0.9% (0.7–1.3) | 917.03 | < 0.01 | 98.7% | ||
| Yunnan | Southwestern China | 5 | 42,019 | 225 | 1.6% (0.7–2.8) | 142.03 | < 0.01 | 97.2% | ||
| Zhejiang | Eastern China | 3 | 19,442 | 1,196 | 4.5% (2.4–7.2) | 84.62 | < 0.01 | 97.6% | ||
a Correlation analysis: Joint analysis with prevalence of provinces of China; R2: Proportion of between-study variance explained; I2-res: Residual variation due to heterogeneity.