Table 2.
Subgroup analysis of asymptomatic tuberculosis proportion in the elderly population
| Subgroup analysis type | No. of studies | Effect size | M | Heterogeneity | ||
|---|---|---|---|---|---|---|
| ES [95%CI] | PES | I2 (%) | PH | |||
| All studies | 9 | 0.677[0.547,0.795] | < 0.001 | R | 90.197 | < 0.001 |
| Subgroup analysis by sample size | ||||||
| < 15,000 | 4 | 0.706[0.523,0.862] | < 0.001 | R | 88.033 | < 0.001 |
| ≥ 15,000 | 5 | 0.623[0.459,0.774] | < 0.001 | NA | NA | NA |
| Subgroup analysis by study country | ||||||
| High-burden countries | 8 | 0.663[0.525,0.789] | < 0.001 | R | 91.285 | < 0.001 |
| Non-high-burden countries | 1 | 0.813[0.544,0.960] | < 0.001 | NA | NA | NA |
| Subgroup analysis by screening strategy | ||||||
| CXR only | 2 | 0.598[0.525,0.669] | < 0.001 | NA | NA | NA |
| CXR and others | 7 | 0.676[0.511,0.821] | < 0.001 | R | 91.526 | < 0.001 |
| Subgroup analysis by study start year | ||||||
| Before 2019 | 7 | 0.723[0.581,0.847] | < 0.001 | R | 85.711 | < 0.001 |
| After 2019 | 2 | 0.543[0.486,0.601] | < 0.001 | NA | NA | NA |