Comparison 2. Axillary sampling versus full axillary surgery.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 All‐cause mortality	3	967	Hazard Ratio (95% CI)	0.94 [0.73, 1.21]
1.1 radiotherapy	2	872	Hazard Ratio (95% CI)	0.84 [0.64, 1.11]
1.2 no radiotherapy	1	95	Hazard Ratio (95% CI)	1.47 [0.84, 2.56]
2 Local recurrence	3	1404	Hazard Ratio (95% CI)	1.41 [0.94, 2.12]
2.1 radiotherapy	2	659	Hazard Ratio (95% CI)	1.40 [0.89, 2.19]
2.2 no radiotherapy	1	745	Hazard Ratio (95% CI)	1.48 [0.58, 3.82]
3 Axillary recurrence	1		Hazard Ratio (95% CI)	Totals not selected
4 Locoregional recurrence	1		Hazard Ratio (95% CI)	Totals not selected
4.1 radiotherapy	1		Hazard Ratio (95% CI)	0.0 [0.0, 0.0]
4.2 no radiotherapy	0		Hazard Ratio (95% CI)	0.0 [0.0, 0.0]
5 Distant metastasis	1		Hazard Ratio (95% CI)	Totals not selected
5.1 radiotherapy	1		Hazard Ratio (95% CI)	0.0 [0.0, 0.0]
5.2 no radiotherapy	0		Hazard Ratio (95% CI)	0.0 [0.0, 0.0]
6 Lymphoedema. Increase in arm circumference (≥ 12 months postop)	1		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected
6.1 radiotherapy	1		Odds Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
7 Shoulder lateral rotation (12 months postop)	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
7.1 radiotherapy	1		Mean Difference (IV, Fixed, 95% CI)	0.0 [0.0, 0.0]
8 Seroma	1		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected
8.1 radiotherapy	1		Odds Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]