Subgroup analysis | N | Pooled mean difference (95% CI) | I2 (P) |
---|---|---|---|
Geographic area | |||
 America | 2 | 50.73 (45.87–55.58) | 0 (0.385) |
 Asia | 11 | 31.68 (26.35–36.59) | 99.2 (P < 0.001) |
 Europe | 3 | 37.97 (26.45–36.90) | 92.9 (P < 0.001) |
Country | |||
 China | 6 | 32.18(26.56–37.81) | 99.1 (P < 0.001) |
NAFLD diagnostic criteria | |||
 Ultrasonography | 15 | 34.46 (29.95–38.97) | 98.9% (P < 0.001) |