Table 4 Multivariable linear regression models investigating the association between changes in health-related quality of life and age, gender, and injury characteristics among older adults aging with long-term spinal cord injury.

Independent variables	Depressive feelings^a			Global quality of life^a
Independent variables	Beta	B	95% CI for B	Beta	B	95% CI for B
Age at second assessment (years)	−0.13	−0.25	−0.70, 0.20	0.31	0.10	−0.31, 0.92
Female gender	0.07	2.32	−5.26, 9.90	−0.09	−0.72	−10.93, 9.49
Time since injury at second assessment (years)	−0.07	−0.05	−0.41, 0.27	−0.16	−0.39	−0.86, 0.09
Non-traumatic injury	−0.14	−4.43	−13.51, 4.65	0.05	2.62	−9.92, 15.16
Tetraplegia AIS A–C^b	−0.29*	−12.16*	−22.39, −1.94	0.36**	25.35**	11.15, 39.54
Paraplegia AIS A–C^b	−0.14	−4.55	−13.26, 4.16	0.31**	16.79**	4.48, 29.09
Score at initial assessment	−0.47**	−0.46**	−0.68, −0.24	−0.67**	−0.76**	−0.96, 15.16
Adjusted R²	0.16			0.43

Beta standardized regression coefficient, B unstandardized regression coefficient, CI confidence interval
*p < 0.05; **p < 0.01.
^aChange scores (scores at the initial assessment were subtracted from the scores at the second assessment) for the subscales Depressive feelings and Global quality of life in the Spinal Cord Injury Quality of Life Questionnaire (SCI QL-23). Lower scores on depressive feelings indicate greater quality of life (QoL). Higher scores on global QoL indicate greater QoL.
^bReference category: all AIS D.

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