Table 3 Results from Egger's test and trim and fill analysis
Outcomes | No. of included items | SMD (95% CI) | P value | Egger's test | |
|---|---|---|---|---|---|
t | P value | ||||
(Before trim and fill) | |||||
 BUN | 16 | − 1.67[− 2.27,− 1.07] |  < 0.001 | − 2.82 | 0.014 |
 Scr | 13 | − 1.88[− 2.91,− 0.85] |  < 0.001 | − 3.18 | 0.009 |
 ACR | 14 | − 1.60[− 2.16,− 1.04] |  < 0.001 | − 3.66 | 0.003 |
(After trim and fill) | |||||
 BUN | 21 | − 1.10[− 1.79,− 0.41] | 0.002 | − 0.53 | 0.6 |
 Scr | 18 | − 0.91[− 2.16, 0.33] | 0.152 | − 0.07 | 0.941 |
 ACR | 20 | − 0.85[− 1.56,− 0.14] | 0.019 | − 0.32 | 0.756 |