Table 3. Results of subgroup analysis of pooled HR of complication, DFS and CSS of cancers with low PNI level.

Subgroup analysis	No.of studies	No.of patients	Pooled HR [95%CI]	Meta-regression (P value)	Heterogeneity I2 (%)	Heterogeneity P value
post-operative complications	3	1009	2.31 [1.63, 3.28]	0	26.3	0.257
DFS	3	979	1.85 [1.19, 2.89]	0.006	67.9	0.044
CSS	2	749	1.81 [0.94, 3.49]	0.076	85	0.01