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Table 3 Egger’s linear regression test to measure the funnel plot asymmetric

From: Prevalence of unprotected anal intercourse in men who have sex with men recruited online versus offline: a meta-analysis

Subgroups Y-axis intercept: α (95% CI)
Overall effects 0.28 (-3.68 to 4.26)
European subsample 1.95 (-3.11 to 7.01)
American subsample -2.08 (-10.59 to 6.43)
Asian subsample 8.09 (-29.29 to 45.47)
Sample size >500 -0.24 (-5.07 to 4.59)
Sample size ≤ 500 10.95 (-15.43 to 37.33)
UAI in last 6 or more months -0.78 (-9.07 to 7.50)
UAI in last 3 months 1.11 (-3.36 to 5.58)
  1. CI, confidence interval; UAI, unprotected anal intercourse.