Comparison 2. Laparoscopic versus open transhiatal oesophagectomy (Subgroup analyses).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Serious adverse events (proportion) (stage I adenocarcinoma)	1		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
2 Short‐term mortality (lower‐third cancer)	3	160	Risk Ratio (M‐H, Fixed, 95% CI)	0.33 [0.01, 7.99]
3 Long‐term mortality (lower third cancer)	1		Hazard Ratio (Fixed, 95% CI)	Totals not selected
4 Serious adverse events (proportion) (lower third cancer)	2	120	Risk Ratio (M‐H, Fixed, 95% CI)	0.45 [0.17, 1.22]