Fig. 1

Flow chart of included residents, nursing services and SHAs at each survey time
Note. nresidents = number of study participants, nservice = number of nursing services, nSHA = number of SHA, nresidentsIG = number of study participants in intervention group, nserviceIG = number of nursing services in intervention group, nSHAIG = number of SHA in intervention group, nresidentsCG = number of study participants in control group, nserviceCG = number of nursing services in control group, nSHACG = number of SHA in control group