Development and Validation of Total Pain Scale for Evaluation of Total Pain in Cancer Patients.

Objectives: Cancer pain has all the components of total pain such as physical, social, psychological, and spiritual. These components contribute to the overall pain experience in cancer patients. Many instruments have been developed till date to assess the effect of pain in cancer patients but none of the instruments include all components of total pain. In this article, we describe the development and validation of the total pain scale (TPS) for the evaluation of total pain in cancer patients with pain. This study aimed to develop and validate a questionnaire for the evaluation of total pain in cancer patients with pain.

Material and methods: This study included a review of existing pain questionnaires for cancer pain for item pool generation. Items were generated in the Hindi language by six stakeholders to create 23 items to develop TPS. TPS was applied to 300 Hindi-speaking cancer patients. Bivariate correlation was used to reduce the number of items as well as construction of the domain followed by factor analysis to finalise TPS. Confirmatory factor analysis (CFA) was performed for testing the validity and reliability of TPS.

Results: TPS is an 18-item scale composed of four domains (physical, social, spiritual and psychological domain). The internal consistency of TPS and its subscales was found to be very good (a = 0.84-0.88). CFA and structural equation modeling Goodness of fit has confirmed that model 4 is the best fit as it yielded a lesser root-mean-squared error of approximation value of 0.062 and a greater comparative fit index, Tucker-Lewis index value of 0.944. The convergent and divergent validity of TPS and its domain was good.

Conclusion: This study reports TPS to be a brief (18-item), valid, and reliable questionnaire in the Hindi language for assessment of all components of total pain in cancer patients with pain.