Table 1.
Summary of notably strong associations for pairs of items within the same questionnaire (top part of Table) and between pair of items for the different questionnaires used (bottom part of Table) for the baseline PROMs.
| Item in questionnaire (1) | Item in questionnaire (2) | Correlation coefficient | |
|---|---|---|---|
| Items within the same questionnaire | PSQI 1: sleep quality | Global PSQI | 0.77 ± 0.03 [0.72, 0.82] |
| PSQI 3: sleep duration | Global PSQI | 0.81 ± 0.02 [0.79, 0.85] | |
| BJSQ 19: full energy | BJSQ 20: lively | 0.87 ± 0.01 [0.87, 0.90] | |
| BJSQ 21: angry | BJSQ 22: annoyed | 0.80 ± 0.03 [0.76, 0.88] | |
| BJSQ 21: angry | BJSQ 23: irritable | 0.82 ± 0.02 [0.79, 0.86] | |
| BJSQ 32: not concentrating | BJSQ 33: gloomy | 0.70 ± 0.03 [0.66, 0.75] | |
| BJSQ 16: job suits me well | BJSQ 56: satisfied with job | 0.78 ± 0.02 [0.72, 0.80] | |
| WEMWBS 8: feel good | WEMWBS 10: feel confident | 0.74 ± 0.02 [0.70, 0.78] | |
| WEMWBS 8: feel good | Total WEMWBS | 0.76 ± 0.03 [0.72, 0.81] | |
| WEMWBS 10: feel confident | Total WEMWBS | 0.73 ± 0.04 [0.68, 0.79] | |
| WEMWBS 14: cheerful | Total WEMWBS | 0.75 ± 0.02 [0.74, 0.81] | |
| Items between different questionnaires | BJSQ 27: tense | WEMWBS 3: relaxed | − 0.73 ± 0.03 [− 0.78, − 0.67] |
| BJSQ 16: job suits me well | WWQB-I 10: work-life balance | − 0.40 ± 0.05 [− 0.46, − 0.30] | |
| PSQI 7: daytime dysfunction | Total WEMWBS | − 0.33 ± 0.05 [− 0.47, − 0.31] | |
| BJSQ 16: job suits me well | Total WEMWBS | 0.38 ± 0.05 [0.28, 0.45] | |
| BJSQ 20: lively | Total WEMWBS | 0.56 ± 0.03 [0.54, 0.67] | |
| BJSQ 23: irritable | Total WEMWBS | − 0.61 ± 0.05 [− 0.68, − 0.52] | |
| BJSQ 33: gloomy | Total WEMWBS | − 0.68 ± 0.03 [− 0.73, − 0.64] | |
| BJSQ 56: satisfied with job | Total WEMWBS | − 0.47 ± 0.05 [− 0.53, − 0.38] | |
| BJSQ 57: satisfied with family | Total WEMWBS | − 0.54 ± 0.04 [− 0.49, − 0.60] | |
| WWQB-I 9: tired | Total WEMWBS | − 0.52 ± 0.04 [− 0.56, − 0.43] | |
| WWQB-I 10: work-life balance | Total WEMWBS | 0.49 ± 0.04 [0.39, 0.53] |
We kept the description of each item using a short version above for brevity; see the corresponding questionnaires on how each item was exactly phrased when participants completed the entries ("Questionnaires_in_SHAW.xlsx"). We used the term ‘item’ freely above to refer both to the actual PROMs items provided by participants and also the overall computed scores (e.g. global PSQI). The last column is the Spearman correlation coefficient along with the standard deviation and confidence intervals. All reported correlations were statistically significant (p < 0.05), with bold entries having statistical significance p-values < 0.001. The computations used a single entry per participant from the baseline PROMs completion.