Table 1.

Single mediation model on disability

Mediator	α (SE)	β (SE)	αβ (SE)	95% CI of αβ	z	αβ/(αβ+τ′)
HPV	0.022 (0.004)*	−11.684 (2.310)*	−0.257 (0.005)*	−0.406 to −0.134	−51.40	0.181

Notes:

^*P<0.01; α estimate of frailty status (unstandardized regression coefficient) on score of HPV; β estimate of the independent effect of the mediator (unstandardized regression coefficient) on scores of ADL; αβ product of coefficient estimate; mediated effect; SE; 95% CI of αβ 95% confidence interval of the mediated effect; z standard deviated associated with mediated effect (used for significance testing); αβ/(αβ+τ′) proportion of mediated effect.

Abbreviations: ADL, Activities of Daily Living; CI, confidence interval; HPV, health perceptions variability; SE, standard error.