Reanalysis of the physical and mental health summary scores of dialysis versus conservative care in older patients with advanced chronic kidney disease: a critical appraisal

Table 2 Multiple linear regression models of the physical and mental component summary scores, using the norm-based scoring algorithm with orthogonal rotation, in patients choosing dialysis but not yet started on dialysis (n = 39), in patients started on dialysis (n = 34), and in patients choosing conservative care (n = 23)

A—Physical component summary score^a	B	95% CI for B	Beta	P value
Constant	33.17	28.93 to 37.42
Female vs. male	− 4.85	− 8.89 to − 0.81	− 0.24	0.02
Treatment pathway (conservative care as reference)
Not yet started on dialysis vs. conservative care	6.61	1.79 to 11.43	0.34	< 0.01
Started on dialysis vs. conservative care	2.20	− 2.79 to 7.20	0.11	0.38

B—Mental component summary score^b	B	95% CI for B	Beta	P value
Constant	43.97	39.88 to 48.06
Interviewer-administration vs. self-administration	13.44	9.07 to 17.80	0.56	< 0.001
Treatment pathway (conservative care as reference)
Not yet started on dialysis vs. conservative care	6.45	1.48 to 11.41	0.28	0.01
Started on dialysis vs. conservative care	− 0.58	− 5.80 to 4.64	− 0.03	0.83

CI confidence interval, vs. versus
^aPhysical Component Summary score model: R² = 0.15, F(3,92) = 5.24, P = 0.002. Results were similar when additionally adjusted for age, Davies comorbidity score, and way of administration
^bMental component summary score model: R² = 0.31, F(3,92) = 14.02, P < 0.001. Results were similar when additionally adjusted for age, sex, and Davies comorbidity score

ISSN: 1756-0500