Dialysis headache in patients undergoing peritoneal dialysis and hemodialysis

Figures & data

Table 1. Demographic and clinical characteristics.

Characteristic	HD	PD	p
Age (years)	59.9 ± 12.73	59.75 ± 11.53	0.776
Sex
Male	199	48	0.091
Female	119	43
Kt/V
Satisfactory^a	139	29	0.838
Non-satisfactory^b	131	29
BP systolic (mmHg)	141.26 ± 23.189	137.42 ± 21.705	0.137
BP diastolic (mmHg)	88.5 ± 24.37	79.78 ± 12.315	0.029
Underlying renal disease
Vascular	86	49	0.000
Parenchymal	141	20
Unknown	91	22

Notes: BP = blood pressure.

^aKt/V >1.2 for HD, Kt/V >2 for PD.

^bKt/V <1.2 for HD, Kt/V <2 for PD.

Table 2. Biochemical characteristics of the study groups.

Variable	CAPD	HD	p
Hgb (g/L)	112.1 ± 10.29	93.63 ± 15.53	0.000
Ca (mmol/L)	2.245 ± 0.224	2.335 ± 0.24	0.004
P (mmol/L)	1.598 ± 0.451	1.857 ± 0.565	0.000
Ca × P (mmol^2/L^2)	3.602 ± 1.057	4.324 ± 1.332	0.000
K (mmol/L)	4.392 ± 0.828	5.335 ± 0.868	0.000
Na (mmol/L)	138.78 ± 3.61	141.26 ± 3.81	0.000
Urea (mmol/L)	17.875 ± 6.235	29.028 ± 8.115	0.000
Creatinine (umol/L)	766.81 ± 206.91	886.73 ± 243.98	0.000

Notes: Hgb—hemoglobin, Ca—calcium, P—phosphate, Ca × P—calcium–phosphate product, K—potassium, Na—sodium.

Table 3. Types of predialysis headaches.

Predialysis headaches types	HD	PD	p
Primary, n (%)	41 (12.9)	2 (2.2)	0.002
Symptomatic, n (%)	12 (3.8)	1 (1.1)	0.313

Table 4. Dialysis headache features in hemodialysis (HD) patients.

Headache features	n (%)
Male sex	16 (76)
Only during HD	15 (71)
Begining in the third hour of HD	11 (52)
Duration less than 4 h	16 (76)
Anterior localization	11 (52)
Bilateral presentation	17 (81)
Pain intensity (VAS ≥8)	11 (52)
Quality of pain—non-pulsating	14 (67)
No associated symptoms	14 (67)
Predialysis headache	0 (0)

Note: VAS—verbal-analogous scale.