Table 5.

Simple linear regression analysis of mental component summary scores in patients with moderate and advanced chronic kidney disease n = 202

Variable	Coefficient	Standard error	t	95% confidence interval	P value
Age	−0.01	0.05	−0.01	− 0.93–0.09	0.995
Educational level	1.42	1.51	0.94	− 1.56–4.41	0.348
Employment status	−0.61	1.51	−0.40	−3.60–2.38	0.690
Low income	−6.08	1.91	−3.18	−9.84–−2.30	0.002
Marital status	0.66	1.62	0.41	−2.54–3.86	0.685
Hypertension	−1.70	1.64	−1.03	−4.93–1.54	0.303
Hemoglobin	1.15	0.29	3.95	0.57–1.72	< 0.001
MCV	0.21	0.10	2.10	0.01–0.40	0.037
MCH	0.32	0.24	1.35	−0.15–0.80	0.178
Uraemia	−3.78	1.55	−2.45	−6.83–−0.73	0.015
CKD stage 5	−4.36	1.65	−2.64	−7.62–1.10	0.009
ESA use	0.34	2.60	.0.13	−4.76–5.48	0.895
IV Iron	14.12	5.35	2.64	3.56–24.69	0.009

MCV mean corpuscular volume, MCH mean corpuscular haemoglobin, CKD 5 chronic kidney disease with GFR < 15 ml/min/1.73m², ESA erythropoietin stimulating agent, IV intravenous, CI confidence interval, uraemia serum urea > 20 mmol/L