Validity of the Supportive Care Needs Survey Short Form 34 in the Amazon population

Vieira, Henry Walber Dantas; Gallasch, Cristiane Helena; Rebustini, Flavio; Balbinotti, Marcos Alencar Abaide; Padilha, Katia Grillo; Ferretti-Rebustini, Renata Eloah de Lucena

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Original Article • Acta Paul Enferm. 34 • 2021 • https://doi.org/10.37689/acta-ape/2021AO02342 copy

Validity of the Supportive Care Needs Survey Short Form 34 in the Amazon population

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Objective:

To analyze the construct validity of the Supportive Care Needs Survey Short Form 34 (SCNS SF-34) in the population with cancer treated in Manaus, in the Brazilian Amazon region.

Methods:

Psychometric study carried out in an institution specialized in oncology, from April to June 2016. The data sources included a form with socio-demographic and clinical data, and the Brazilian version of the referred instrument. The sample was composed by 691 participants, considering a sample calculation of 20 patients per item. Exploratory and confirmatory factor analysis, verification of internal consistency and evaluation of the invariance of the factor model according to gender, age and time of treatment were carried out.

Results:

Of the 691 patients, 92.6% were from the state of Amazonas, 72.6% were female (72.6%), 64.4% were under 60 years old, 54.4% were on treatment for more than six months, 55.6% had a tumor in the female reproductive system and 56.1% underwent surgery. There was a factorial solution of four domains and good adjustment indexes obtained by confirmatory factor analysis (χ² = 1.828.981; df = 520; χ^2/df = 3.51; p<0.001; CFI = 0.926; TLI= 0.918; RMSEA = 0.084 (90% CI= 0.082-0.090), with an invariant pattern across the different groups (gender, age group and duration of treatment).

Conclusion:

The Brazilian version of the Supportive Care Needs Survey Short Form 34, composed by 34 items distributed in four domains (Physical and Daily Living, Psychological, Sexuality and Care and Support) was valid and accurate to measure the care needs for individuals diagnosed with cancer in the Amazon region.

Keywords
Neoplasms; Oncology nursing; Nursing care; Psychometrics; Validation studies

		Factor solution – five factors					Factor solution – four factors
KMO						0,864
Bartlett's x² _(DF) (p-value)						59050.5₍₄₉₆₎ (p<0.001)
Eigenvalue >1				1					1
Explained variation (%)				57,6%					52,3%
Items	Factor 1	Factor 2	Factor 3	Factor 4	Factor 5	Commun.	Factor 1	Factor 2	Factor 3	Factor 4	Commun.
i1				0,540		0,373		0,507			0,377
i2				0,736		0,538		0,725			0,542
i3				0,728		0,527		0,719			0,551
i4				0,338		0,160		0,427			0,171
i5				0,557		0,379		0,612			0,405
i6					0,340	0,359	0,410				0,375
i7					0,654	0,530	0,662				0,557
i8					0,674	0,570	0,636				0,575
i9					0,804	0,546	0,748				0,533
i10					0,777	0,555	0,716				0,539
i11					0,809	0,554	0,742				0,514
i12					0,613	0,388	0,541				0,332
i13					0,550	0,342	0,474				0,301
i14					0,667	0,436	0,655				0,432
i15			0,967			0,941				0,928	0,905
i16			0,924			0,856				0,883	0,810
i17					0,322	0,229	0,417				0,243
i18		0,863				0,632			0,575		0,402
i19		0,854				0,660			0,609		0,421
i20	0,310					0,380			0,513		0,366
i21						0,244			0,492		0,310
i22	0,501					0,427			0,646		0,462
i23	0,844					0,631			0,748		0,544
i24	0,904					0,698			0,803		0,634
i25	0,691					0,469			0,724		0,474
i26	0,783					0,598			0,820		0,608
i27	0,526					0,416			0,709		0,470
i28	0,425					0,372			0,406		0,382
i29	0,675					0,506			0,552		0,484
i30	0,532					0,365			0,557		0,341
i31	0,468		0,314			0,358			0,340	0,387	0,379
i32	0,396	0,362				0,433			0,725		0,501
i33	0,313	0,469				0,454			0,748		0,531
i34	0,512					0,321			0,534		0,315
	F1	F2	F3	F4	F5		F1	F2	F3	F4
F1	1,000						1,000
F2	0,549	1,000					0,499	1,000
F3	0,339	0,249	1,000				0,337	0,403	1,000
F4	0,364	0,309	0,267	1,000			0,292	0,252	0,423	1,000
F5	0,343	0,401	0,368	0,533	1,000
Cronbach's Alpha							0,888	0,808	0,918	0,931
Total							0,926

Adjustment coefficients Sample 2 (n=341 patients)	Initial	Adjusted
X²	2233.660	1828.981
Standard deviation	521	520
X^2/df; p-value	4.2; p<0.001	3.5; p<0.001
Comparative adjustment index	0.901	0.926
Tucker-Lewis Index	0.893	0.918
Root mean square error of approximation	0.098	0.084
90%CI	(0.091-0.102)	(0.082-0.090)
Adjustment (control error)		1

		WLSMV X2 (GL)	p-value	CFI	TLI	RMSEA (90%CI)
Gender
	Configural	2855.349 (1.040)	<0.001	0.932	0.927	0.071 (0.068-0.074)
	Metric	2880.136 (1.070)	<0.001	0.932	0.929	0.070 (0.067-0.073)
	Scalar	2880.754 (1.168)	<0.001	0..36	0.938	0.065 (0.062-0.068)
Age group
	Configural	3014.510 (1.040)	<0.001	0.935	0.929	0.074 (0.071-0.077)
	Metric	3062.556 (1.070)	<0.001	0.934	0.931	0.073(0.070-0.077)
	Scalar	3099.348 (1.168)	<0.001	0.936	0.938	0.069 (0.066-0.072)
Time of treatment
	Configural	2981.581 (1.040)	<0.001	0.935	0.930	0.074 (0.071-0.077)
	Metric	3012.503 (1.070)	<0.001	0.935	0.932	0.073(0.070-0.076)
	Scalar	3033.499 (1.168)	<0.001	0.938	0.940	0.069 (0.066-0.072)

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 Henry Walber Dantas Vieira, E-mail: hvieira@ufam.edu.br