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Can Optimism, Pessimism, Hope, Treatment Credibility and Treatment Expectancy Be Distinguished in Patients Undergoing Total Hip and Total Knee Arthroplasty?
PLoS One 2015; 10(7):e0133730Plos

Abstract

OBJECTIVES

The constructs optimism, pessimism, hope, treatment credibility and treatment expectancy are associated with outcomes of medical treatment. While these constructs are grounded in different theoretical models, they nonetheless show some conceptual overlap. The purpose of this study was to examine whether currently available measurement instruments for these constructs capture the conceptual differences between these constructs within a treatment setting.

METHODS

Patients undergoing Total Hip and Total Knee Arthroplasty (THA and TKA) (Total N = 361; 182 THA; 179 TKA), completed the Life Orientation Test-Revised for optimism and pessimism, the Hope Scale, the Credibility Expectancy Questionnaire for treatment credibility and treatment expectancy. Confirmatory factor analysis was used to examine whether the instruments measure distinct constructs. Four theory-driven models with one, two, four and five latent factors were evaluated using multiple fit indices and Δχ2 tests, followed by some posthoc models.

RESULTS

The results of the theory driven confirmatory factor analysis showed that a five factor model in which all constructs loaded on separate factors yielded the most optimal and satisfactory fit. Posthoc, a bifactor model in which (besides the 5 separate factors) a general factor is hypothesized accounting for the commonality of the items showed a significantly better fit than the five factor model. All specific factors, except for the hope factor, showed to explain a substantial amount of variance beyond the general factor.

CONCLUSION

Based on our primary analyses we conclude that optimism, pessimism, hope, treatment credibility and treatment expectancy are distinguishable in THA and TKA patients. Postdoc, we determined that all constructs, except hope, showed substantial specific variance, while also sharing some general variance.

Authors+Show Affiliations

Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Centre, Amsterdam, The Netherlands.Department of Orthopaedics, Leiden University Medical Center, Leiden, The Netherlands.Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Centre, Amsterdam, The Netherlands; Musculoskeletal Division, The George Institute for Global Health, The University of Sydney, Sydney, New South Wales, Australia.Department of Orthopaedics, Rijnland Ziekenhuis, Leiderdorp, The Netherlands.Department of Orthopaedics, Leiden University Medical Center, Leiden, The Netherlands.Department of Orthopaedics, Leiden University Medical Center, Leiden, The Netherlands.Department of Clinical Psychology and the EMGO Institute for Health and Care Research, VU University Amsterdam, The Netherlands.Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Centre, Amsterdam, The Netherlands.Department of Rehabilitation Medicine and the EMGO Institute, VU University Medical Centre, Amsterdam, The Netherlands.Department of Epidemiology and Biostatistics, VU University Medical Centre, Amsterdam, The Netherlands.Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Centre, Amsterdam, The Netherlands; Department of Health Sciences and the EMGO Institute for Health and Care Research, VU University, Amsterdam, The Netherlands.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26214176

Citation

Haanstra, Tsjitske M., et al. "Can Optimism, Pessimism, Hope, Treatment Credibility and Treatment Expectancy Be Distinguished in Patients Undergoing Total Hip and Total Knee Arthroplasty?" PloS One, vol. 10, no. 7, 2015, pp. e0133730.
Haanstra TM, Tilbury C, Kamper SJ, et al. Can Optimism, Pessimism, Hope, Treatment Credibility and Treatment Expectancy Be Distinguished in Patients Undergoing Total Hip and Total Knee Arthroplasty? PLoS ONE. 2015;10(7):e0133730.
Haanstra, T. M., Tilbury, C., Kamper, S. J., Tordoir, R. L., Vliet Vlieland, T. P., Nelissen, R. G., ... Ostelo, R. W. (2015). Can Optimism, Pessimism, Hope, Treatment Credibility and Treatment Expectancy Be Distinguished in Patients Undergoing Total Hip and Total Knee Arthroplasty? PloS One, 10(7), pp. e0133730. doi:10.1371/journal.pone.0133730.
Haanstra TM, et al. Can Optimism, Pessimism, Hope, Treatment Credibility and Treatment Expectancy Be Distinguished in Patients Undergoing Total Hip and Total Knee Arthroplasty. PLoS ONE. 2015;10(7):e0133730. PubMed PMID: 26214176.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Can Optimism, Pessimism, Hope, Treatment Credibility and Treatment Expectancy Be Distinguished in Patients Undergoing Total Hip and Total Knee Arthroplasty? AU - Haanstra,Tsjitske M, AU - Tilbury,Claire, AU - Kamper,Steven J, AU - Tordoir,Rutger L, AU - Vliet Vlieland,Thea P M, AU - Nelissen,Rob G H H, AU - Cuijpers,Pim, AU - de Vet,Henrica C W, AU - Dekker,Joost, AU - Knol,Dirk L, AU - Ostelo,Raymond W, Y1 - 2015/07/27/ PY - 2014/12/10/received PY - 2015/06/30/accepted PY - 2015/7/28/entrez PY - 2015/7/28/pubmed PY - 2016/5/6/medline SP - e0133730 EP - e0133730 JF - PloS one JO - PLoS ONE VL - 10 IS - 7 N2 - OBJECTIVES: The constructs optimism, pessimism, hope, treatment credibility and treatment expectancy are associated with outcomes of medical treatment. While these constructs are grounded in different theoretical models, they nonetheless show some conceptual overlap. The purpose of this study was to examine whether currently available measurement instruments for these constructs capture the conceptual differences between these constructs within a treatment setting. METHODS: Patients undergoing Total Hip and Total Knee Arthroplasty (THA and TKA) (Total N = 361; 182 THA; 179 TKA), completed the Life Orientation Test-Revised for optimism and pessimism, the Hope Scale, the Credibility Expectancy Questionnaire for treatment credibility and treatment expectancy. Confirmatory factor analysis was used to examine whether the instruments measure distinct constructs. Four theory-driven models with one, two, four and five latent factors were evaluated using multiple fit indices and Δχ2 tests, followed by some posthoc models. RESULTS: The results of the theory driven confirmatory factor analysis showed that a five factor model in which all constructs loaded on separate factors yielded the most optimal and satisfactory fit. Posthoc, a bifactor model in which (besides the 5 separate factors) a general factor is hypothesized accounting for the commonality of the items showed a significantly better fit than the five factor model. All specific factors, except for the hope factor, showed to explain a substantial amount of variance beyond the general factor. CONCLUSION: Based on our primary analyses we conclude that optimism, pessimism, hope, treatment credibility and treatment expectancy are distinguishable in THA and TKA patients. Postdoc, we determined that all constructs, except hope, showed substantial specific variance, while also sharing some general variance. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/26214176/Can_Optimism_Pessimism_Hope_Treatment_Credibility_and_Treatment_Expectancy_Be_Distinguished_in_Patients_Undergoing_Total_Hip_and_Total_Knee_Arthroplasty L2 - http://dx.plos.org/10.1371/journal.pone.0133730 DB - PRIME DP - Unbound Medicine ER -