Multiple mediation model of shortness of breath on OPH through physical and social functioning with coefficients indicated for each path. Total effect = .41 (P = < .001). Indirect effect for physical functioning = .16 (95% CI, .05–.26) and for social functioning = .14 (95% CI, .03–.23). Contrast in indirect effects was 0.03 (95% CI, −.15 to .20). R2 = .30; Adjusted R2 = .29 (F3,261 = 37.42, P < .001).
** < .01. *** < .001.