Psychometric validation of the general comfort questionnaire in chronic patients under kidney hemodialysis

Melo, Geórgia Alcântara Alencar; Silva, Renan Alves; Pereira, Francisco Gilberto; Lima, Letícia Aguiar; Magalhães, Thereza Moreira; Silva, Viviane Martins da; Caetano, Joselany Áfio

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Brasil

Acta Paulista de Enfermagem

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Brasil

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Original Article • Acta Paul Enferm 33 • 2020 • https://doi.org/10.37689/acta-ape/2020AO02585 copy

Psychometric validation of the general comfort questionnaire in chronic patients under kidney hemodialysis

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Objective

To assess the psychometric properties of the General Comfort Questionnaire, Brazilian version.

Methods

A methodological study. Participants were 260 chronic patients under kidney hemodialysis submitted to application of the General Comfort Questionnaire, and submitted to exploratory factor analysis and data reliability.

Results

the sample was considered adequate by the Kaiser-Meyer-Olkin test (0.815; p<0.001). In the exploratory analysis of factors by estimating the main components, 10 factors were obtained, which explained 60.14% of the measure variability. The scree plot test use resulted in four factors (psychospiritual, sociocultural, environmental, and physical) that explained 38.01% of the total variance. The overall Cronbach’s Alpha value of the 48 items was 0.83. Excluding items with low commonality, Cronbach’s Alpha of 0.80 was identified. Thus, it was observed that 33 items remained among the validated versions between the group of experts and the exploratory factor analysis, respecting the psychometric principles, with loss of 15 items.

Conclusion

GCQ is valid and reliable for measuring comfort in chronic patients under kidney hemodialysis.

Patient confort; Renal insufficiency, chronic; Nursing theory; Reproducibility of results; Factor analysis, statistical

Rotary component matrix^a
	Component
	1	2	3	4	H²
Item 9	0.689				0.511
Item 10	0.673				0.538
Item 23	0.540				0.381
Item 15	0.531				0.333
Item 44	0.530				0.364
Item 17	0.511				0.279
Item 29	0.505				0.278
Item 37	0.500				0.331
Item 46	0.496				0.364
Item 7	0.425				0.266
Item 31	0.413				0.339
Item 38	0.398				0.166
Item 33	0.397				0.187
Item 47	0.339				0.193
Item 4	0.328				0.169
Item 20	0.271				0.143
Item 41	0.086				0.017
Item 24		0.604			0.380
Item 22		0.566			0.349
Item 6		0.562			0.386
Item 39		0.532			0.319
Item 16		0.531			0.350
Item 45		0.515			0.446
Item 21		0.458			0.390
Item 13		0.447			0.327
Item 26		0.425			0.272
Item 14		0.413			0.255
Item 19		0.238			0.121
Item 48		-0.475			0.250
Item 11			0.641		0.476
Item 18			0.629		0.426
Item 28			0.539		0.395
Item 32	.		0.522		0.353
Item 30			0.510		0.317
Item 35			0.482		0.325
Item 1			0.426		0.214
Item 40			0.413		0.324
Item 42			0.374		0.225
Item 27			0.325		0.165
Item 3			0.305		0.170
Item 25			0.244		0.068
Item 12			-0.529		0.306
Item 8				0.505	0.484
Item 34				0.461	0.258
Item 2				0.416	0.199
Item 43				0.408	0.266
Item 36				0.399	0.317
Item 5				0.159	0.062

	Average scale if the item is excluded	Scale variance if the item is excluded	Corrected total item correlation	Multiple squared correlation	Cronbach’s Alpha if the item is excluded
Item 1	144.0750	266.070	0.251	0.333	0.818
Item 2	145.5042	269.615	0.147	0.306	0.821
Item 3	143.9792	267.702	0.220	0.265	0.819
Item 4	143.5750	272.798	0.121	0.267	0.820
Item 5	145.3792	273.165	0.051	0.200	0.824
Item 6	144.9875	255.862	0.465	0.385	0.811
Item 7	143.8792	263.287	0.393	0.361	0.814
Item 8	145.1250	259.089	0.372	0.454	0.814
Item 9	143.5167	267.180	0.429	0.555	0.815
Item 10	143.5542	269.436	0.279	0.518	0.817
Item 11	143.9375	263.214	0.397	0.494	0.814
Item 12	145.3708	286.912	-0.283	0.411	0.834
Item 13	144.0417	261.237	0.417	0.448	0.813
Item 14	144.4167	259.809	0.392	0.343	0.814
Item 15	143.7292	266.993	0.353	0.362	0.816
Item 16	144.8667	257.212	0.389	0.353	0.813
Item 17	143.4417	272.925	0.180	0.286	0.819
Item 18	144.2458	261.651	0.354	0.485	0.815
Item 19	143.6417	268.984	0.228	0.234	0.818
Item 20	145.0042	263.736	0.285	0.316	0.817
Item 21	143.9792	257.954	0.501	0.456	0.811
Item 22	144.6083	257.553	0.407	0.454	0.813
Item 23	143.4542	270.935	0.276	0.402	0.818
Item 24	145.2958	260.803	0.365	0.420	0.814
Item 25	144.2708	268.466	0.144	0.169	0.822
Item 26	144.7125	261.712	0.285	0.347	0.817
Item 27	143.8583	270.741	0.153	0.187	0.820
Item 28	144.2250	256.493	0.471	0.400	0.811
Item 29	143.8375	264.840	0.371	0.368	0.815
Item 30	144.0375	267.534	0.236	0.335	0.818
Item 31	143.9250	260.061	0.492	0.426	0.812
Item 32	144.6333	265.062	0.242	0.366	0.818
Item 33	144.8083	266.951	0.246	0.305	0.818
Item 34	144.2833	270.798	0.128	0.291	0.821
Item 35	144.5375	257.589	0.419	0.375	0.813
Item 36	144.0792	260.374	0.390	0.443	0.814
Item 37	144.1250	262.235	0.365	0.391	0.815
Item 38	143.4417	271.988	0.231	0.331	0.819
Item 39	145.3250	267.727	0.181	0.294	0.820
Item 40	143.8750	261.340	0.459	0.401	0.813
Item 41	143.3833	275.635	0.088	0.142	0.820
Item 42	143.9500	269.219	0.174	0.305	0.820
Item 43	144.7750	279.020	-0.094	0.247	0.829
Item 44	143.5083	266.954	0.452	0.445	0.815
Item 45	143.8583	258.365	0.551	0.512	0.810
Item 46	143.8750	268.210	0.258	0.358	0.818
Item 47	143.8125	265.927	0.318	0.351	0.816
Item 48	143.7667	285.811	-0.339	0.366	0.830

Escola Paulista de Enfermagem, Universidade Federal de São Paulo R. Napoleão de Barros, 754, 04024-002 São Paulo - SP/Brasil, Tel./Fax: (55 11) 5576 4430 - São Paulo - SP - Brazil
E-mail: actapaulista@unifesp.br

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[1] Corresponding author Renan Alves Silva. E-mail: renan.dehon@gmail.com