Comparison 1. Radiotherapy plus chemotherapy versus radiotherapy.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1.1 Death from all causes	2	297	HR (IV, Random, 95% CI)	0.56 [0.36, 0.87]
1.2 Disease progression	2	297	HR (IV, Random, 95% CI)	0.47 [0.30, 0.74]
1.3 Grade 4 toxicity	3	321	Risk Ratio (M‐H, Random, 95% CI)	6.26 [2.50, 15.67]