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Expected and observed correlations of the Dutch PFS physical and mental subscales with other constructs
| Spearman’s rank correlation | ||||
|---|---|---|---|---|
| Instrument (scale range) | PFS physical score (0–50) | PFS mental score (0–50) | ||
| Expected | Observed | Expected | Observed | |
| iADL (0–8) | 0.3–0.5 | 0.4 | 0.3–0.5 | 0.3 |
| Frailty Phenotype (0–5) | 0.3–0.5 | 0.6 | 0.3–0.5 | 0.4 |
| SBT (0–28) | ≤ 0.3 | 0.1 | ≤ 0.3 | 0.1 |
Abbreviations: iADL Instrumental Activities of Daily Living; PFS Pittsburgh Fatigability Scale; SBT Short Blessed Test
