End-stage renal disease adherence questionnaire: translation and validation to the portuguese language

Figures & data

Table 1. Results of ICC analysis, showing strong test–retest stability for all items.

	95% Confidence interval		F-test
ICC	Lower bound	Upper bound	F-value	df1	df2	Sig.
0.931	0.694	0.984	14.5	8	8	0.001

Table 2. Results of content validity of PESRD-AQ by experts.

ESRD-AQ area (item number)	Item number in agreement	Number of experts in agreement	Item number in disagreement	Number of experts in disagreement	I-CVI
General information (1–5)	2, 4, 5	7	1, 3	1	0.94
Hemodialysis attendance (6–19)	6–13, 16–19	7	14, 15	1	0.98
Medication (20–28)	20–28	7		0	1
Fluid (29–38)	29–38	7		0	1
Diet (39–46)	39–46	7		0	1
Average I-CVI					0.98

Table 3. Comparison of sociodemographic data, and biological and biochemical markers of non-adherence between dialysis patients who were adherent and non-adherent to the different aspects of the therapeutic strategy, based on PESRD-AQ scores.

	PESRD-AQ total score			Dialysis treatment			Medication			Fluid restriction			Dietary restriction
	Adherents (n = 51)	Non-adherents (n = 134)	p-Value	Adherents (n = 173)	Non-adherents (n = 12)	p-Value	Adherents (n = 156)	Non-adherents (n = 29)	p-Value	Adherents (n = 92)	Non-adherents (n = 93)	p-Value	Adherents (n = 81)	Non-adherents (n = 104)	p-Value
Age, years	68.2 ± 12.4	65.8 ± 14.9	0.270	66.45 ± 14.2	67.0 ± 15.7	0.899	66.8 ± 13.9	64.8 ± 16.0	0.481	67.4 ± 12.9	65.4 ± 15.4	0.337	67.4 ± 13.0	65.7 ± 15.2	0.421
Gender, % male	52.9	48.5	0.624	50.3	41.7	0.767	48.7	55.2	0.550	58.7	40.9	0.019	49.4	50.0	1.000
Time under dialysis, months	60.0 (32.3–101.8)	40.5 (19.0–73.0)	0.132	48.0 (22.0–80.3)	35.0 (17.3–78.0)	0.671	48.0 (22.5–80.5)	44.0 (15.0–78.0)	0.627	55.0 (28.5–90.0)	37.0 (19.0–73.0)	0.113	51.5 (27.3–86.5)	40.5 (19.0–75.0)	0.374
URR, %	78.6 ± 5.1	79.8 ± 5.2	0.165	79.4 ± 5.3	79.7 ± 4.3	0.844	79.3 ± 5.1	80.5 ± 5.5	0.261	78.9 ± 4.9	79.9 ± 5.5	0.211	78.7 ± 5.2	80.0 ± 5.1	0.084
KTv	1.7 ± 0.3	1.7 ± 0.3	0.588	1.7 ± 0.3	1.7 ± 0.2	0.664	1.7 ± 0.3	1.8 ± 0.4	0.120	1.6 ± 0.3	1.7 ± 0.3	0.049	1.7 ± 0.3	1.7 ± 0.3	0.897
Diastolic pressure, mmHg	63.1 ± 11.7	64.5 ± 14.2	0.537	63.6 ± 13.7	70.6 ± 10.0	0.085	63.7 ± 13.4	66.1 ± 14.9	0.395	63.1 ± 12.9	65.3 ± 14.3	0.299	64.4 ± 12.3	64.0 ± 14.5	0.846
Systolic pressure, mmHg	133.8 ± 20.6	136.0 ± 20.8	0.516	135.8 ± 21.2	133.4 ± 10.1	0.478	135.2 ± 20.5	138.0 ± 22.3	0.501	134.2 ± 20.5	136.8 ± 20.8	0.389	134.1 ± 19.9	136.5 ± 21.2	0.439
Glucose, mg/dL^a	159.3 ± 64.6	161.3 ± 63.9	0.908	159.8 ± 61.5	176.0 ± 103.3	0.625	159.9 ± 60.7	167.6 ± 90.7	0.767	163.5 ± 57.3	158.6 ± 68.9	0.761	155.7 ± 68.9	164 ± 59.9	0.574
Interdialytic weight gain, kg	2.0 ± 0.8	2.2 ± 0.8	0.268	2.1 ± 0.9	2.0 ± 0.6	0.663	2.1 ± 0.9	1.9 ± 0.7	0.234	1.9 ± 0.8	2.3 ± 0.9	0.015	2.1 ± 0.8	2.1 ± 0.9	0.652
Interdialytic weight gain, % of dry weight	3.1 ± 1.1	3.1 ± 1.2	0.968	3.1 ± 1.2	3.1 ± 0.7	0.870	3.2 ± 1.2	2.8 ± 1.0	0.144	2.9 ± 1.1	3.3 ± 1.2	0.043	3.1 ± 1.1	3.1 ± 1.3	0.761
Hemoglobin, g/dL	11.8 ± 1.7	11.1 ± 1.5	0.007	11.3 ± 1.6	11.2 ± 1.2	0.745	11.3 ± 1.5	11.1 ± 1.6	0.518	11.5 ± 1.6	11.1 ± 1.4	0.071	11.6 ± 1.6	11.1 ± 1.5	0.017
Ferritin, ng/mL	394.0 (267.0–571.0)	488.0 (238.0–679.1)	0.300	466.4 (254.3–665.9)	366.2 (177.8–697.1)	0.743	427.5 (238.8–673.5)	519.4 (305.5–663.8)	0.739	427.0 (235.4–703.0)	488.0 (252.0–666.0)	0.899	386.8 (230.1–570.8)	533.5 (276.3–733.4)	0.015
Albumin, g/L	4.0 ± 0.3	4.0 ± 0.3	0.930	4.0 ± 0.3	3.9 ± 0.4	0.481	3.9 ± 0.4	4.0 ± 0.4	0.311	3.9 ± 0.3	3.9 ± 0.3	0.974	3.9 ± 0.3	4.0 ± 0.3	0.431
Potassium, mmol/L	5.3 ± 0.7	5.0 ± 0.8	0.051	5.1 ± 0.8	4.8 ± 0.8	0.306	5.1 ± 0.9	5.1 ± 0.6	0.866	5.1 ± 0.8	5.0 ± 0.8	0.424	5.0 ± 0.8	5.1 ± 0.7	0.156
Phosphorus, mg/dl	4.4 ± 1.2	4.1 ± 1.1	0.191	4.2 ± 1.2	3.9 ± 0.9	0.382	4.2 ± 1.2	4.1 ± 1.2	0.792	4.2 ± 1.2	4.2 ± 1.2	0.922	4.3 ± 1.2	4.1 ± 1.1	0.090

Significant diffences between groups are presented in bold. URR: Urea reduction ratio.

^aData presented correspond only to diabetic dialysis patients.