Table 4.
Association between exposure to PM10 and risk of NAFLD by subgroup analysis.
| Subgroups | Categories | No. of studies | OR, 95%CI | I2 (%) | P values within subgroups |
|---|---|---|---|---|---|
| Study design | Cross-sectional | 3 | 1.01 (0.97, 1.06) | 87.7 | 0.542 |
| Cohort | 4 | 1.26 (1.00, 1.60) | 82.2 | 0.053 | |
| Sample size | < 100,000 | 3 | 1.06 (0.95, 1.19) | 0.0 | 0.305 |
| >100,000 | 4 | 1.07 (1.01, 1.14) | 93.4 | 0.021 | |
| Economic level | Developed countries | 3 | 1.16 (1.02, 1.31) | 0.0 | 0.025 |
| Developing countries | 4 | 1.06 (1.00, 1.12) | 92.8 | 0.058 | |
| Geographic area | Asia | 3 | 1.02 (0.98, 1.06) | 88.0 | 0.380 |
| Europe | 3 | 1.31 (0.95, 1.81) | 82.8 | 0.097 | |
| Outcome | NAFLD | 4 | 1.27 (0.95, 1.71) | 75.4 | 0.107 |
| MAFLD | 2 | 1.03 (1.03, 1.04) | 0.0 | <0.001 |