Validity and test-retest reliability of the Brazilian version of the Return-to-work self-efficacy questionnaire

Silva-Junior, João Silvestre; Souto, Ester Paiva; Fischer, Frida Marina; Griep, Rosane Härter

doi:10.11606/S1518-8787.2018052000237

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Sumário

Original Article • Rev. Saúde Pública 52 • 2018 • https://doi.org/10.11606/S1518-8787.2018052000237 copy

Validity and test-retest reliability of the Brazilian version of the Return-to-work self-efficacy questionnaire

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

OBJECTIVE

To investigate the validity and test-retest reliability of the Brazilian version of the Dutch questionnaire “Verwachtingen over werken”.

METHODS

We analyzed data from a longitudinal study conducted in the city of São Paulo, Brazil, from 2014 to 2016. Participants were 411 workers on sick leave for more than 15 days due to mental disorders. A subsample of 126 participants responded the questionnaire a second time, seven to 21 days later. Factorial and concurrent validities and the test-retest reliability were analyzed.

RESULTS

Most participants were female (71.5%), the average age was 36.7 years; 83.1% had attended 12 or more years of formal schooling; the average length of sick leave was 84 days. The average self-efficacy score tended to be below the scale midpoint. The construct had a two-dimensional structure and the concurrent validity confirmed the original construct. For all items, the test-retest reliability adjusted for prevalence ranged from good (0.70) to almost perfect (0.83).

CONCLUSIONS

While the two-dimensional structure diverges from the original, other parameters were adequate. Application of the Return-to-work self-efficacy questionnaire to Brazilian workers might contribute to the planning of return-to-work process. Additional studies are needed to complement the analysis of the use of this instrument in Brazil.

Mental Disorders, rehabilitation; Return to Work; Employment, Supported; Self efficacy; Surveys and Questionnaires, utilization; Validation Studies; Occupational Health

Variable	Total sample			Retest sample

	n (%)	Mean (SD)	Var.	n (%)	Mean (SD)
Sex	411			108
Male	117 (28.5)			20 (18.5)
Female	294 (71.5)			88 (81.5)
Age (years)	411	36.7 (8.8)	19–64	108	36.5 (8.2)
Educational level (years of formal schooling)	409			108
< 12	69 (16.9)			3 (2.8)
≥ 12	340 (83.1)			105 (97.2)
Length of sick leave (days)	411	84 (92.2)	15–439	108	83 (88.6)
Return-to-work Self-Efficacy Scale	411	30.6 (10.2)	11–66	108	28.3 (12.6)
General Perceived Self-Efficacy Scale	405	23.1 (7.3)	10–40
Depression Anxiety Stress Scale	401	44.4 (17.4)	0–63

Items	CFA1

	(n = 206)

	F1	Error
1. I’m able to cope well with the difficulties at the job.	0.831	0.309
2. I can’t perform my job well because of my emotional status.	0.364	0.868
3. I can set boundaries to the tasks performed at the job.	0.775	0.399
4. I can accomplish my tasks performed at the job.	0.850	0.278
5. I can manage emotionally difficult situations at the job.	0.814	0.338
6. I don’t have any energy left for anything else.	0.371	0.862
7. I can concentrate enough on my work.	0.883	0.220
8. I can deal with the hectic routine at the workplace.	0.911	0.170
9. I can’t solve possible problems at the job.	0.183	0.966
10. I’m enough motivated to perform my job.	0.774	0.400
11. I can meet the physical demands of my job.	0.818	0.330

Adjustment indexes

CFI/TLI	0.885/0.857
Root mean square error of approximation (RMSEA) (95%CI)	0.230 (0.213–0.248)
Correlation F1-F2	-

Items	EFA			CFA2

	F1	F2	Error	F1	F2	Error
1. I’m able to cope well with the difficulties at the job.	0.846	0.186	0.225	0.865		0.252
2. I can’t perform my job well because of my emotional status	0.054	0.608	0.622		0.639	0.592
3. I can set boundaries to the tasks performed at the job.	0.807	0.045	0.341	0.814		0.337
4. I can accomplish my tasks at the job.	0.907	0.127	0.144	0.920		0.153
5. I can manage emotionally difficult situations at the job.	0.855	0.074	0.254	0.863		0.255
6. I don’t have any energy left for anything else.	0.005	0.813	0.339		0.827	0.315
7. I can concentrate enough on my work.	0.917	0.087	0.163	0.912		0.167
8. I can deal with the hectic routine at the workplace.	0.921	0.910	0.156	0.917		0.159
9. I can’t solve possible problems at the job.	0.022	0.834	0.306		0.814	0.337
10. I’m enough motivated to perform my job.	0.856	0.123	0.268	0.824		0.321
11. I can meet the physical demands of my job.	0.831	0.097	0.313	0.798		0.363

Adjustment indexes

CFI/TLI	0.985/0.976			0.992/0.990
Root mean square error of approximation (RMSEA) (95%CI)	0.114 (0.093–0.135)			0.073 (0.051–0.940)
Correlation F1-F2	0.077			0.093
Correlation between item #10 and #11	-			0.340

Item	Cronbach’s alpha test (n = 411)	Cronbach’s alpha after item removal - test	Cronbach’s alpha retest (n = 126)	Cronbach’s alpha after item removal - retest
	0.722		0.920
1. I’m able to cope well with the difficulties at the job.		0.652		0.908
2. I can’t perform my job well because of my emotional status.		0.743		0.918
3. I can set boundaries to the tasks performed at the job.		0.654		0.912
4. I can accomplish my tasks at the job.		0.651		0.904
5. I can manage emotionally difficult situations at the job.		0.647		0.906
6. I don’t have any energy left for anything else.		0.721		0.925
7. I can concentrate enough on my work.		0.689		0.907
8. I can deal with the hectic routine at the workplace.		0.686		0.911
9. I can’t solve possible problems at the job.		0.741		0.924
10. I’m enough motivated to perform my job.		0.688		0.910
11. I can meet the physical demands of my job.		0.686		0.908

Items	Weighted Kappa-squared	95%CI	PABAK
1. I’m able to cope well with the difficulties at the job.	0.54	0.37–0.72	0.80
2. I can’t perform my job well because of my emotional status.	0.22	0.01–0.43	0.70
3. I can set boundaries to the tasks performed at the job.	0.61	0.47–0.76	0.86
4. I can accomplish my tasks at the job.	0.70	0.58–0.81	0.86
5. I can manage emotionally difficult situations at the job.	0.48	0.32–0.65	0.78
6. I don’t have any energy left for anything else.	0.40	0.22–0.58	0.75
7. I can concentrate enough on my work.	0.52	0.35–0.69	0.79
8. I can deal with the hectic routine at the workplace.	0.45	0.26–0.64	0.75
9. I can’t solve possible problems at the job.	0.19	0.00–0.38	0.64
10. I’m enough motivated to perform my job.	0.63	0.47–0.78	0.82
11. I can meet the physical demands of my job.	0.51	0.35–0.68	0.75

Faculdade de Saúde Pública da Universidade de São Paulo Avenida Dr. Arnaldo, 715, 01246-904 São Paulo SP Brazil, Tel./Fax: +55 11 3061-7985 - São Paulo - SP - Brazil
E-mail: revsp@usp.br

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[1] Correspondence: João Silvestre Silva-Junior. Av. Francisco Matarazzo, 345 Água Branca 05036-040 São Paulo, SP, Brasil. E-mail: silvajunior.js@gmail.com