Table 4. Multivariate regression analysis for the PCS.

Parameter	Coefficient	95% CI	P
Age, years	−0.23	−0.57 to 0.1	0.16
Total treatment time, months	1.76	0.38 to 3.14	0.013
Type of tracheal device	7.44	−0.32 to 15.2	0.06
Gender	−8.0	−18 to 1.93	0.11

PCS, physical component summary.