Test-retest reliability and minimal detectable change of the Beck Depression Inventory and the Taiwan Geriatric Depression Scale in patients with Parkinson's disease

Abstract

BackgroundThe Beck Depression Inventory II (BDI-II) and the Taiwan Geriatric Depression Scale (TGDS) are self-report scales used for assessing depression in patients with Parkinson’s disease (PD) and geriatric people. The minimal detectable change (MDC) represents the least amount of change that indicates real difference (i.e., beyond random measurement error) for a single subject. Our aim was to investigate the test-retest reliability and MDC of the BDI-II and the TGDS in people with PD.MethodsSeventy patients were recruited from special clinics for movement disorders at a medical center. The patients’ mean age was 67.7 years, and 63.0% of the patients were male. All patients were assessed with the BDI-II and the TGDS twice, 2 weeks apart. We used the intraclass correlation coefficient (ICC) to determine the reliability between test and retest. We calculated the MDC based on standard error of measurement. The MDC% was calculated (i.e., by dividing the MDC by the possible maximal score of the measure).ResultsThe test-retest reliabilities of the BDI-II/TGDS were high (ICC = 0.86/0.89). The MDCs (MDC%s) of the BDI-II and TGDS were 8.7 (13.8%) and 5.4 points (18.0%), respectively. Both measures had acceptable to nearly excellent random measurement errors.ConclusionsThe test-retest reliabilities of the BDI-II and the TGDS are high. The MDCs of both measures are acceptable to nearly excellent in people with PD. These findings imply that the BDI-II and the TGDS are suitable for use in a research context and in clinical settings to detect real change in a single subject.

Cross-cultural adaptation of the Brazilian version of the Dentine Hypersensitivity Experience Questionnaire (DHEQ-15)

“…The SDC is the smallest threshold of a change score that is beyond random error at a certain confidence level. 32,33 The present research showed small SDC values, they indicated that low differences between consecutive assessments of a single patient are able to announce a real change beyond random error.…”

“…Reliability is of central importance in assessment of agreement between measurements in successive sessions. 32 Reliability depends on both ICC and SEM of subjects taking an assessment. The SEM is the amount of error that can be attributed to measurement error, and it is an adequate calculation if one needs a general statistic for describing the accuracy of the score achieved by a randomly chosen subject.…”

“…If the measurement error of an instrument is not determined, the interpretability of the test scores is limited. 32 It was used SDC in order to calculate the random measurement error. The SDC is the smallest threshold of a change score that is beyond random error at a certain confidence level.…”

Exploring a capacity to screen of the European Portuguese version of the 15-item Geriatric Depression Scale

“…Other authors (Ertan, Ertan, Kızıltan, & Uyguçgil, 2005;Huang, Hsieh, Wu, & Lu, 2017;Weintraub, Oehlberg, Katz, & Stern, 2006) have attested the reliability and validity of the GDS among patients with Parkinson's Disease. GDS has also been identified as a suitable tool for screening purpose in older adults with different gender, educational level and age (Conradsson, 2013;Chiesi et al, 2017;Dias et al, 2017).…”

Ibero-American initiative for dual disorders to improve public treatment programs

“…The review also showed that the most commonly used instruments for the diagnosis of SUD or OPD were the International Composite Diagnostic Interview (Robins et al, 1988), the Mini International Neuropsychiatric Interview (Sheehan et al, 1997), and the Structured Clinical Interview of the DSM-IV for Axis I (Lobbestael, Leurgans, & Arntz, 2011), while the instruments used for Brazil 4 2 1 29 36 Chile --5 5 Colombia 1 --5 6 Costa Rica --2 2 Guatemala ---2 2 Jamaica ---1 1 Mexico 2 --14 16 Nicaragua ---1 1 Panama ---1 1 Paraguay ---1 1 Uruguay ---1 1 detections were the Hospital Anxiety and Depression Scale (Zigmond & Snaith, 1983); the Hamilton Depression Scale (Bagby, Ryder, Schuller, & Marshall, 2004), Depression Scales (Huang, Hsieh, Wu, & Lu, 2017), and Beck's Anxiety Index (Magán, Sanz, & García-Vera, 2008). Despite efforts made in Latin America, the results showed that the number of publications in scientific journals on the subject is limited (this is particularly critical when comparing to other developed countries such as the US, Canada, and those in Europe).…”