highly significantP < 0.0001
When these numbers were analyzed, the statistic for the pooled data was not significant (G P = 0.05, 1 df, P = 0.8307), but the heterogeneity statistic was highly significant (G H = 39.2, 9 df, P < 0.0001), as was the total statistic (G T = 39.2, 10 df, P < 0.0001).