Table 1.

Qualification rate of theoretical knowledge of nosocomial infection before and after intervention.

Position	Before intervention			After intervention			χ2	P	CI
	Participants (n)	Qualified (n)	Qualified (%)	Participants (n)	Qualified (n)	Qualified (%)			Lower	Upper
Doctors	169	105	62.13	205	183	89.27	5.11	0.024	1.05	1.97
Nurses	413	305	73.85	475	436	91.79	4.69	0.030	1.02	1.51
Nursing attendants	86	35	40.70	138	97	70.29	5.22	0.022	1.08	2.77
Cleaners	37	13	35.14	51	42	82.35	5.04	0.025	1.11	4.97
Security guards	27	10	37.04	35	31	88.57	3.94	0.017	1.00	5.72
Total	732	468	63.93	904	789	87.28	16.52	<0.001	1.18	1.59