Health related quality of life in chronic kidney disease; a descriptive study in a rural Sri Lankan community affected by chronic kidney disease

Table 5 Independent predictors of QOL using multiple linear regression

	Kidney Component Summary Score		Physical Component Summary Score		Mental Component Summary Score
	Beta coefficient	95% CI	Beta coefficient	95% CI	Beta coefficient	95% CI
Age	0.02	−0.02 to 0.059	−0.005	− 0.08 to 0.07	NA
Gender
Male	NA		NA		NA
Female	NA		NA		NA
Education level	0.52^a	0.08 to 0.95	0.632	−0.22 to 1.49	0.84^a	0.16 to 1.53
Employment
Employed	1.27^a	0.30 to 2.23	1.94^a	0.05 to 3.83	1.04	−0.45 to 2.53
Not employed	1		1		1
Income (in thousands)	0.05	−0.08 to 0.07	0.15^a	0.03 to 0.27	0.12^a	0.03 to 0.22
Comorbidities
Present	−0.38	−1.27 to 0.52	NA		NA
Absent	1		NA		NA
CKD stage	−1.38^a	−1.92 to −0.82	−6.37^a	−7.46 to −5.28	−6.31^a	−7.19 to −5.44
Depression
Positive	−5.31^a	−6.25 to −4.37	−2.16^a	−4.01 to −0.31	−3.35^a	−4.8 to − 1.8
Negative	1		1		1
Psychological distress
Positive	−3.31^a	−4.34 to −2.28	−9.30^a	−11.3 to − 7.2	− 6.02^a	− 7.6 to −4.3
Negative	1		1		1
Symptom burden	NA		0.06^a	0.02 to 0.10	NA

^aSignificant at the 0.05 level
NA – The variable is not significant in the univariate linear regression, thus not included in the multiple linear regression

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