Attention and information processing in end stage renal disease and effect of hemodialysis: a bedside study

Figures & data

Table 1. Digit symbol substitution task.

		Patients
	Controls	Pre-dialysis	Post-dialysis
Time for completion (in s)	272.9 ± 35.8	353.0 ± 71.5#	339.6 ± 71.2*,^
Correct responses	99.8 ± 0.6	98.9 ± 2.7	99.3 ± 1.6
Errors	0.2 ± 0.6	1.0 ± 2.7	0.7 ± 1.6
Omissions	0	0.13 ± .34	0.03 ± .18

Notes: #p < 0.025 (using Bonnferroni correction) for analysis between controls and pre-dialysis.

*p < 0.001 for analysis between pre and post dialysis.

^p < 0.025 (using Bonnferroni correction) for analysis between controls and post-dialysis.

Table 2. One letter cancellation task.

		Patients
	Controls	Pre-dialysis	Post-dialysis
Time for completion (in s)	301.0 ± 28.4	372.7 ± 85.4#	329.0 ± 63.0*
Correct responses	251.5 ± 3.5	247.1 ± 11.5	249.4 ± 11.5
Errors	0.4 ± 1.1	2.5 ± 7.0	0.5 ± 1.2
Omissions	2.0 ± 2.3	8.8 ± 11.3#	5.8 ± 6.0^

Notes: #p < 0.025 (using Bonnferroni correction) for analysis between controls and pre-dialysis.

*p < 0.001 for analysis between pre and post dialysis.

^p < 0.025 (using Bonnferroni correction) for analysis between controls and post-dialysis.

Table 3. Three letter cancellation task.

		Patients
	Controls	Pre-dialysis	Post-dialysis
Time for completion (in s)	266.0 ± 32.6	437.4 ± 79.4#	414.6 ± 73.5*,^
Correct responses	253.3 ± 2.6	237.6 ± 12.2#	241.3 ± 7.0^
Errors	1.1 ± 1.3	2.4 ± 6.4	1.2 ± 1.2
Omissions	1.6 ± 1.9	11.2 ± 10.5#	8.0 ± 6.9^

Notes: #p < 0.025 (using Bonnferroni correction) for analysis between controls and pre-dialysis.

*p < 0.001 for analysis between pre and post dialysis.

^p < 0.025 (using Bonnferroni correction) for analysis between controls and post-dialysis.

Table 4. Biochemical parameters.

	Pre-dialysis	Post-dialysis
Serum Na^+ (meq/L)	133.8 ± 1.85	136.27 ± 2.20***
Serum K^+ (meq/L)	4.78 ± 0.98	3.45 ± 0.22***
Blood urea (mg/dL)	170.10 ± 8.12	117.89 ± 20.65***
Serum creatinine (mg/dL)	8.24 ± 0.85	6.88 ± 0.87***
Serum HCO3^− (mg/dL)	24.51 ± 1.80	28.14 ± 1.81***

Note: ***p < 0.001.