Hand washing with soap and water together with behavioural recommendations prevents infections in common work environment: an open cluster-randomized trial

Table 2 Cluster characteristics, and outcome data from the total study period, weeks 7-74 (a total of 68 weeks), as well as from the first part of the study prior to the influenza A/H1N1 pandemic for the infection proportion (no. of infection episodes/reported weeks).

Random. set and triplet	Arm and cluster code	Total staff number	Relative infection risk sum	Initial number of particip.	Soap or disinfectant usage per participant	Number of reported weeks	Median coverage% of weeks	No. of infection episodes	Infection proportion, whole study	Infection proportion, before the pandemic	Sick leave proportion	Absence proportion
I/A	IR2 12	160	35	52	5.3	2997	89.5	305	0.102	0.113	0.037	0.040
	IR1 16	100	39	48	7.5	2515	89.7	195	0.078	0.095	0.029	0.030
	C 26	80	45	22	nr	1159	88.9	111	0.096	0.096	0.054	0.057
I/B	C 15	100	45	36	nr	1740	73.6	122	0.070	0.083	0.026	0.037
	IR2 14	100	47	12	15.8	648	76.9	72	0.111	0.111	0.045	0.057
	IR1 13	160	50	57	9.2	3544	83.1	443	0.125	0.115	0.072	0.078
I/C	IR2 24	76	51	25	8.1	1537	89.1	263	0.171	0.170	0.034	0.051
	IR1 20	50	55	12	2.8	645	91.7	55	0.085	0.110	0.029	0.029
	C 25	96	57	27	nr	1248	73.9	174	0.139	0.185	0.036	0.043
I/D	IR2 21	50	57	16	7.5	1132	86.4	102	0.090	0.087	0.027	0.034
	C 22	50	65	20	nr	1174	94.7	133	0.113	0.135	0.035	0.040
	IR1 18	82	72	31	5.1	1807	96.3	131	0.072	0.061	0.031	0.032
II/A	IR2 6	118	41	37	5.4	2078	86.1	213	0.103	0.096	0.037	0.045
	C 3	150	50	50	nr	2690	89.2	313	0.116	0.127	0.031	0.037
	IR1 10	123	58	54	3.9	3167	91.7	312	0.099	0.094	0.041	0.055
II/B	IR2 5	110	68	33	7.1	2079	97.1	194	0.093	0.080	0.031	0.047
	IR1 7	45	69	23	6.2	1370	91.3	105	0.077	0.075	0.034	0.039
	C 2	150	70	33	nr	1841	88.1	184	0.100	0.095	0.037	0.043
II/C	IR2 9	100	86	27	6.3	1515	85.2	139	0.092	0.087	0.035	0.050
	C 8	160	87	36	nr	1792	82.4	177	0.099	0.096	0.033	0.041
	IR1 4	80	104	32	1.3	1966	91.3	210	0.107	0.105	0.024	0.034
Total	IR1	640	903	257	6.1	15014	89.5	1451	0.097	0.096	0.037	0.043
	IR2	714	774	202	6.9	11986	89.0	1288	0.107	0.108	0.035	0.046
	C	786	851	224	nr	11644	83.8	1214	0.104	0.115	0.036	0.043

ISSN: 1745-6215