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Results of the Spearman’s rank correlation coefficient r
| Correlation Parameter | Spearman correlation coefficient r1 | p-value |
|---|---|---|
| Age and MSD | 0.17 | < 0.01 |
| BMI and MSD | 0.19 | < 0.01 |
| Working years and MSD | 0.20 | < 0.01 |
1 Criteria by Evans (1996): <0.2: poor correlation, 0.2–0.4: weak correlation, 0.4–0.6: moderate correlation, 0.6–0.8: strong correlation, > 0.8: optimal correlation
