TABLE 1.

Characteristics and group differences between patients with (CI group) and without cognitive impairment (NCI group).

Variables		NCI group (n = 75)	CI group (n = 45)	P
Age (year)		51.87 ± 13.18	65.02 ± 8.99	< 0.001*
Gender	Male	50 (66.67%)	23 (51.11%)	0.092#
	Female	25 (33.33%)	22 (48.89%)
Education level	< 6 years	3 (4%)	17 (37.78%)	< 0.001#
	6–12 years	36 (48%)	26 (57.78%)
	> 12 years	36 (48%)	2 (4.44%)
Stroke	Yes	21 (28%)	20 (44.44%)	0.067#
	No	54 (72%)	25 (55.56%)
Take roxadustat N (%)	Yes	22 (29.33%)	5 (11.11%)	0.021#
	No	53 (70.67%)	40 (88.89%)
Hemodiafiltration	Twice/month	23 (30.67%)	15 (33.33%)	< 0.001#
	Once/month	24 (32%)	15 (33.33%)
	No	28 (37.33%)	15 (33.33%)
Hemoperfusion	Twice/month	15 (20%)	2 (4.44%)	0.016#
	Once/month	9 (12%)	4 (8.89%)
	No	51 (68%)	39 (86.67%)
Hemoglobin (g⋅L–1)		108.8 ± 19.57	112.62 ± 17.1	0.28
Total protein (g⋅L–1)		74.87 ± 5.85	69.45 ± 5.89	< 0.001*
Albumin (g⋅L–1)		41.37 ± 2.93	38.45 ± 4.15	< 0.001*
Total bilirubin (μmol⋅L–1)		11.89 ± 4.21	10.38 ± 2.71	0.034*
Serum creatinine (μmol⋅L–1)		939.05 ± 285.08	755.94 ± 197.59	< 0.001*
Serum phosphorus (mmol⋅L–1)		2.12 ± 0.65	1.87 ± 0.58	0.037*
HIF-1α (pg⋅ml–1)		1,272.26 ± 213.66	1,532.76 ± 211.44	< 0.001*
Dialysis duration (month)		19 (11, 62)	30 (13, 60)	0.024&
Intact parathyroid hormone		239.8 (147.9, 365.6)	261 (179.85, 365.25)	0.653&
Serum iron (mmol⋅L–1)		11.1 (9.23, 15.65)	10.40 (7.6, 15.6)	0.494&
Serum ferritin (mmol⋅L–1)		293.55 (171.23, 429.7)	324.9 (168.1, 511.15)	0.653&

*t-test was used for comparing the means.

^#Chi-square test was used to compare categorical variables.

^&Non-parametric rank sum test to compare medians between two independent samples.