Abstract

IntroductionStandardized diagnosis is required and therefore advocated for evidence-based research in Traditional Chinese Medicine (TCM). In this study, we aimed to standardize and validate a protocol that assesses Protective Qi Deficiency (PQD), a common TCM condition that predisposes individuals to pathogenic invasion. Methods3 TCM practitioners evaluated 151 participants for PQD status via conventional TCM methods and a standardized protocol consisting of 13 PQD-related variables identified as potential predictors of a diagnostic algorithm of PQD. The collected data served as the training dataset to determine which predictors that significantly contributed to PQD diagnosis and their coefficients in the resulting algorithm. The algorithm was then reviewed and modified by an independent expert panel following the Delphi method, and subsequently validated using a separate validation dataset (n = 56). ResultsThe Delphi-modified algorithm contained 8 predictor variables and accounted for 73.4 % of the PQD variance in the training dataset. Using the validation dataset, the algorithm predicted a TCM practitioner’s conventional diagnosis of PQD with a high degree of accuracy. The protocol also demonstrated significant precision as demonstrated by a high between-practitioner consistency (0.993) measured by intraclass correlation coefficient. ConclusionOur study provides evidence that, through rigorous standardization, quantitation, and statistical analysis, reliable assessment of a TCM concept can be achieved and applied for researching TCM therapeutics. Nonetheless, the generalizability of these findings need to be tested in future studies with increased numbers of practitioners and participants and in studies conducted at multiple geographical venues.

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