Table 3.

Mean difference in referral letter scores before and after feedback.

	A			B
Speciality	Mean Difference Phase 1 → 2	95% CI	p-value	Mean difference relative to breast referrals at second phase	95% CI	p-value
Breast	31.0	19.4–42.5	<0.001	-	-	-
Colorectal	24.8	6.7–42.7	0.006	-10.4	-21.6 – 0.7	0.065
Urology	20.4	7.3–35.6	0.002	-23.9	-38.3 – -9.5	0.001
Gynaecology	23.9	12.9–35.0	<0.001	-14.9	-20.7 – -9.1	<0.001
Respiratory	31.7	21.3–42.2	<0.001	-6.1	-14.4 – 2.24	0.153
Upper GI	16.0	4.0–28.1	0.009	-21.3	-31.2 – -11.3	<0.001

Key: A = Mean difference by specialty, B = mean difference by specialty relative to breast referrals at the second phase and after taking within-cluster correlation into account.