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Table 2 Methodological quality rating

From: A systematic review of hand hygiene improvement strategies: a behavioural approach

Design of study or assignment rating
Experimental: RCT, random allocation; CCT, quasi-random allocation; three data collection points before and after the intervention 1
Quasi-experimental: CBA, comparable control sites 1
Quasi-experimental: nonequivalent control sites 0
Single group before-after tests with baseline measurement 0
Content
Intervention is clearly described 1
Sample size
Described and justified. An n per group sufficient to detect a significant effect (p < 0.05) with a power of 0.80 or reported calculation of power 1
Validity and reliability of instruments
Unobtrusive observations, rater procedure described and r > 0.80 2
Unobtrusive observations, rater procedure not described or r < 0.80 1
Obtrusive observations, rater procedure described and r > 0.80 1
Obtrusive observations, rater procedure not described or r < 0.80 0
Volume of soap or hand alcohol used 0
Test statistics
Test statistics are described 1
Significance
p Value or confidence interval is given 1
  1. CBA = controlled before-and-after study, CCT = controlled clinical trial, ITS = interrupted time series.
  2. The quality rating is a modification of Anderson and Sharpe’s[30] rating.