Prognostic value of computed tomography derived skeletal muscle mass index in lung cancer: A meta-analysis

Table 2 Results of meta-analysis

	No. of studies	HR	95%CI	P value	I2 (%)	P value
Overall survival	12	1.23	1.11-1.37	< 0.001	84.7	< 0.001
Treatment
Non-surgery	10	1.15	1.06-1.26	0.002	80.4	< 0.001
Surgery	2	5.71	2.94-11.10	< 0.001	0.0	0.655
Tumor stage
Advanced stage	7	1.34	1.07-1.68	0.011	80.8	< 0.001
Early stage	2	5.71	2.94-11.10	< 0.001	0.0	0.655
Tumor type
Non-small cell lung cancer	9	1.97	1.33-2.93	0.001	87.3	< 0.001
Lung cancer	3	1.07	1.03-1.11	< 0.001	0.0	0.471

HR: Hazard ratios; CI: Confidence interval.