Table 3. Weighted analysis of R0 resection and survival outcomes among preoperative CRT, CT, and surgery alone strategies.

Treatment type	R0 resection	1-year OS	3-year OS	5-year OS
Preoperative (chemo)radiotherapy (n=1,026)	80.2%; (95% CI: 79.8–80.6%); reference	75.6%; (95% CI: 75.0–76.1%); reference	46.4%; (95% CI: 45.7–47.1%); reference	38.2%; (95% CI: 37.5–38.8%); reference
Preoperative CT (n=5,027)	63.9%; (95% CI: 63.6–64.2%); P<0.01	76.0%; (95% CI: 75.8–76.2%); P=0.47	46.2%; (95% CI: 45.9–46.4%); P=0.89	35.3%; (95% CI: 35.1–35.5%); P=0.09
Surgery alone (n=1,813)	60.9%; (95% CI: 60.4–61.3%); P<0.01	63.3%; (95% CI: 62.9–63.7%); P<0.01	30.5%; (95% CI: 30.1–31.0%); P<0.01	23.3%; (95% CI: 22.9–23.7%); P<0.01

CRT, chemoradiotherapy; CRT, chemotherapy.