Table 3.

Correlation between age and overall survival in osteosarcoma.

Characteristics	No. of study	HR	95% CI	P	I2
≤12	4	1
<12 and ≤20		1.37	1.13–1.65	0.001	0%
<20	10	1
≥20		1.29	1.08–1.55	0.006	69.1%
<40	5	1
≥40		1.63	1.21–2.20	0.001	36.7%
<25	2	1
≥50		2.60	1.92–3.53	<0.0001	0%
<60	5	1
≥60		1.11	1.06–1.18	<0.0001	97.0%