Table 4

Intervention site preintervention and postintervention estimates of mean number of episodes per week, mean cost per episode and mean cost per week

	Male					Female					Total
	Pre*	Post*	% change	95% CI		Pre*	Post†	% change	95% CI		Pre*	Post†	% change	95% CI
Mean number per week
Asymptomatic	190.2	223.1	17.3	9.5	25.1	356.2	350.7	−1.5	−7.9	4.9	546.3	573.4	5.0	0.0	9.9
Postal negatives	70.5	111.5	58.2	48.7	67.7	96.3	124.9	29.7	22.3	37.0	166.8	236.2	41.6	35.7	47.4
Other‡	119.6	111.5	−6.8	−13.7	0.2	259.9	225.9	−13.1	−19.2	−7.0	379.5	337.2	−11.1	−15.8	−6.5
Symptomatic	92.7	85.0	−8.3	−13.9	−2.7	84.4	77.8	−7.8	−14.6	−1.1	176.7	163.4	−7.5	−11.8	−3.2
Total	282.8	308.0	8.9	2.6	15.2	440.2	429.0	−2.5	−8.7	3.6	723.0	736.8	1.9	−2.5	6.3
Cost per episode (£)
Asymptomatic	36.47	30.92	−15.2	−19.1	−11.3	27.04	24.23	−10.4	−13.3	−7.5	30.31	26.23	−13.5	−15.9	−11.0
Symptomatic	63.09	69.56	10.3	6.7	13.8	63.36	67.65	6.8	4.3	9.2	63.22	69.04	9.2	6.9	11.5
Total	45.19	41.58	−8.0	−10.8	−5.2	33.98	32.14	−5.4	−7.7	−3.1	38.36	35.47	−7.5	−9.3	−5.7
Cost per week (£)
Resource
Postal kit	382	592	55.0	45.9	64.1	629	848	34.8	27.4	42.2	1010	1437	42.3	36.5	48.1
In clinic diagnostic test	1962	1886	−3.9	−9.8	2.1	1452	1213	−16.5	−22.9	−10.1	3413	3155	−7.6	−11.9	−3.3
Consultation staff time	7497	7349	−2.0	−7.3	3.4	9396	8583	−8.7	−15.0	−2.3	16 893	15 959	−5.5	−9.5	−1.5
Treatment	3024	2896	−4.2	−13.1	4.6	3534	3085	−12.7	−20.3	−5.1	6558	6014	−8.3	−14.4	−2.2
Symptom status
Asymptomatic	6949	6883	−1.0	−8.5	6.6	9673	8448	−12.7	−18.9	−6.4	16 622	15 392	−7.4	−12.3	−2.5
Symptomatic	5915	5840	−1.3	−7.5	5.0	5338	5280	−1.1	−8.7	6.6	11 253	11 174	−0.7	−5.5	4.0
Total	12 865	12 723	−1.1	−6.7	4.5	15 010	13 728	−8.5	−14.4	−2.6	27 875	26 565	−4.7	−8.6	−0.8

*Based on 52 week period.
†Based on 43 week period.
‡Includes positive postal test kits.