Table 1.

Outcomes related to the feasibility of identifying and recruiting patients

	NBT: general surgery	NBT: obstetric surgery	UHBham: general surgery	UHBris: general surgery	WORC: general surgery	Total
No. months open*	7	7	9	9	4	36
No. potentially eligible recorded/month (median, IQR)	14 (3.0–25.0)	27 (25.0–48.0)	71 (57.0–80.0)	21 (13.0–25.0)	10 (4.5–13.0)	142 (57.0–152.0)
							No. potentially eligible recorded by staff	96	230	558	196	35	1115
No. (%) potentially eligible confirmed eligible	90 (93.8)	205 (89.1)	469 (84.1)	154 (78.6)	34 (97.1)	952 (85.4)
No. (%) of eligible who were approached	87 (96.7)	126 (61.5)	317 (67.6)	136 (88.3)	33 (97.1)	699 (73.4)
No. (%) of eligible approached and consented†	65 (74.7)	81 (64.3)	120 (37.9)	127 (93.4)	22 (66.7)	415 (59.4)

*Nearest whole month.

†Not all consented patients were finally randomised.

NBT, North Bristol NHS Trust; UHBham, University Hospitals Birmingham NHS Foundation Trust; UHBris, University Hospitals Bristol NHS Foundation Trust; WORC, Worcestershire Acute Hospitals NHS Trust.