highly significantP <0.001
As the test for heterogeneity was highly significant ( P <0.001), we also applied a random-effect model in calculating the HR, which was 1.39 (95% CI: 0.97–1.99) ( Figure 1 ).
As the test for heterogeneity was highly significant ( P <0.001), we also applied a random-effect model in calculating the HR, which was 1.39 (95% CI: 0.97–1.99) ( Figure 1 ).