Skip to main content

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.