PSC dimension agreement indices
| Can-PSC dimension | B Unit ICC | C | D | ||
|---|---|---|---|---|---|
| A Scale mean (SD) | ICC(1) | ICC(2) | Median Rwg(j) (lower bound*) n=24 units | Range of Rwg(j)* n=24 units | |
| (1) Organisational leadership support for safety | 3.24 (0.43) | 0.17 | 0.76 | 0.77 (0.46) | 0.53–0.91 |
| (2) Incident follow-up | 3.23 (0.40) | 0.13 | 0.72 | 0.74 (0.47) | 0.42–0.93 |
| (3) Supervisory leadership for safety | 3.26 (0.44) | 0.09 | 0.62 | 0.64 (0.35) | 0.26–0.82 |
| (4) Unit learning culture | 3.50 (0.34) | 0.08 | 0.58 | 0.83 (0.65) | 0.61–0.93 |
| (5) Judgement-free environment | 3.23 (0.27) | 0.02 | 0.29 | 0.75 (0.64) | 0.53–0.92 |
| (6) Job repercussions of error | 2.85 (0.2) | 0.02 | 0.24 | 0.74 (0.47) | 0.17–0.86 |
*Column C Rwgs are based on a uniform distribution which is what tends to be most commonly reported; however, this practice can lead to inflated Rwgs12 (see online supplementary technical appendix for further details). Accordingly, we report Rwg(j) for the slightly skewed distribution in parentheses as this reflects the lower bound of true agreement.26 The range of Rwg values for the 24 emergency departments in our sample shown in column D are also based on the uniform distribution (eg, the upper bound of true agreement) as they are easier to interpret.
ICC, intraclass correlation coefficient; PSC, patient safety climate.