Optimal number of response categories in rating scales: reliability, validity, discriminating power, and respondent preferences

Preston, Carolyn; Colman, Andrew M.

doi:10.1016/s0001-6918(99)00050-5

Cited by 1,379 publications

(974 citation statements)

References 39 publications

(63 reference statements)

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“…We made our questions specific by providing instructions regarding what the patient was to consider when rating satisfaction, and allowing the patient to provide reasons for their dissatisfaction (Appendix 1) [1,7,10,18]. In addition, we included seven response options, which is recommended, as scales with 7 points show adequate discriminative ability and test-retest reliability [14]. Another potential limitation is that patients may respond differently depending on the format of the questionnaires; however, we conducted a testretest reliability study that showed excellent agreement between the electronic and paper versions [13], therefore there is no evidence that the format in which the patient completed the quality-of-life survey introduced any bias to the results.…”

Section: Discussionmentioning

confidence: 99%

Are Patients Satisfied With a Web-based Followup after Total Joint Arthroplasty?

Marsh

Bryant

MacDonald³

et al. 2014

Clinical Orthopaedics &Amp; Related Research

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Background A web-based followup assessment may be a feasible, cost-saving alternative of tracking patient outcomes after total joint arthroplasty. However, before implementing a web-based program, it is important to determine patient satisfaction levels with the new followup method. Satisfaction with the care received is becoming an increasingly important metric, and we do not know to what degree patients are satisfied with an approach to followup that does not involve an in-person visit with their surgeons. Questions/purposes We determined (1) patient satisfaction and (2) patients' preferences for followup method (web-based or in-person) after total joint arthroplasty.Methods We randomized patients who were at least 12 months after primary THA or TKA to complete a webbased followup or to have their appointment at the clinic. There were 410 eligible patients contacted for the study during the recruitment period. Of these, 256 agreed to participate, and a total of 229 patients completed the study (89% of those enrolled, 56% of those potentially eligible; 111 in the usual-care group, 118 in the web-based group). Their mean age was 69 years (range, 38-86 years). There was no crossover between groups. All 229 patients completed a satisfaction questionnaire at the time of their followup appointments. Patients in the web-based group also completed a satisfaction and preference questionnaire 1 year later. Only patients from the web-based group were asked to indicate preference as they had experienced the web-based and in-person followup methods. We used descriptive statistics to summarize the satisfaction questionnaires and compared results using Pearson's chi-square test. Results Ninety-one patients (82.0%) in the usual-care group indicated that they were either extremely or very satisfied with the followup process compared with 90 patients (75.6%) who were in the web-based group (p \ 0.01; odds ratio [OR] = 3.95; 95% CI, 1.79-8.76). Similarly, patients in the usual care group were more satisfied with the care they received from their surgeon, compared with patients in the web-based group (92.8% versus 73.9%; p\0.01, OR = 1.37; 95% CI, 0.73-2.57). Forty-four percent of patients preferred the web-based method, 36% preferred the usual method, and 16% had no preference (p = 0.01). Conclusions Our results show moderate to high satisfaction levels with a web-based followup assessment. Patients who completed the usual method of in-person followup assessment reported greater satisfaction; however, the difference was small and may not outweigh the

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Section: Discussionmentioning

confidence: 99%

Are Patients Satisfied With a Web-based Followup after Total Joint Arthroplasty?

Marsh

Bryant

MacDonald³

et al. 2014

Clinical Orthopaedics &Amp; Related Research

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“…This may relate to number of response categories available, since MenQoL has a seven point scale and Greene has a four point scale. Preston and Colman [23] found that scales with two, three, or four response categories were least preferred by respondents, and scales with 10, 9, and 7 were most preferred. Also test -retest reliability coefficients were higher for seven-to ten-point scales compared to two-, three-, or fourpoint scales [23].…”

Section: Discussionmentioning

confidence: 99%

“…Preston and Colman [23] found that scales with two, three, or four response categories were least preferred by respondents, and scales with 10, 9, and 7 were most preferred. Also test -retest reliability coefficients were higher for seven-to ten-point scales compared to two-, three-, or fourpoint scales [23]. For the study of menopause, the MenQoL questionnaire has two additional advantages over the Greene scale.…”

Section: Discussionmentioning

confidence: 99%

Chinese medicine treatment for menopausal symptoms in the UK health service: Is a clinical trial warranted?

et al. 2015

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Abstract:Objectives: The aims of this pilot study were to evaluate treatment effects, ascertain safety and formulate best practice Chinese medicine protocols relevant for London women suffering from menopausal symptoms. Study Design:This clinical pilot study employed a case series design within a wider action-based research project. 117 perimenopausal women between 45-55 years of age recruited from the general population were treated for menopausal symptoms by six experienced practitioners of Chinese medicine at the Polyclinic of the University of Westminster. Practitioners were instructed to treat as near to their usual practice style as possible. This involved using Chinese herbal medicine and/or acupuncture along with dietary and lifestyle advice. A maximum of twelve treatments over six months was allowed per patient. Outcome Measures:The Menopause Specific Quality of Life Questionnaire (MenQoL), the Greene Climacteric Scale, and flushing diaries were used to evaluate treatment outcomes. Liver and kidney function tests were carried out at intake and after one, six and twelve treatments to evaluate the safety particularly in relation to the use of herbal medicines.

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“…24 Given the differences in the two scales data have been standardized by dividing each score for the number of categories of the used scale, so 9 for the European populations and 5 for the SR study. This approach is the same as the 'Simple proportion method' described in Colman et al (1977) 25 and similar to the formulas used in Preston and Colman (2000) 26 and Dawes (2002). 27 The only difference in a regression would be noticed on the intercept; however, as, to perform meta-analysis, we are interested only in betas and association is performed within each group, this difference is negligible.…”

Section: Wine-liking Ascertainmentmentioning

confidence: 99%

Genome-wide association analysis on five isolated populations identifies variants of the HLA-DOA gene associated with white wine liking

Pirastu

Kooyman

Traglia³

et al. 2015

Eur J Hum Genet

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Wine is the most popular alcoholic beverage around the world and because of its importance in society has been widely studied. Understanding what drives its flavor has been a quest for decades but much is still unknown and will be determined at least in part by individual taste preferences. Recently studies in the genetics of taste have uncovered the role of different genes in the determination of food preferences giving new insight on its physiology. In this context we have performed a genome-wide association study on red and white wine liking using three isolated populations collected in Italy, and replicated our results on two additional populations coming from the Netherland and Central Asia for a total of 3885 samples. We have found a significant association (P = 2.1 × 10 − 8 ) between white wine liking and rs9276975:C4T a polymorphism in the HLA-DOA gene encoding a non-canonical MHC II molecule, which regulates other MHC II molecules. The same association was also found with red wine liking (P = 8.3 × 10 − 6 ). Sex-separated analysis have also revealed that the effect of HLA-DOA is twice as large in women as compared to men suggesting an interaction between this polymorphism and gender. Our results are one of the first examples of genome-wide association between liking of a commonly consumed food and gene variants. Moreover, our results suggest a role of the MHC system in the determination of food preferences opening new insight in this field in general. INTRODUCTIONWine is probably the oldest produced beverage in human history dating its first apparition in Georgia 7000 BC. It is extremely important for many cultures not only for its economy but also from the social and religious point of view. For these reasons it is also the most common and consumed type of alcoholic beverage throughout the world. 1,2 In addition, several studies indicate that modest wine consumption can have some beneficial health effects, including protection against cardiovascular and Alzheimer's disease. [3][4][5][6] There has been extensive research aiming to improve both its production and its flavor. The taste of wine depends on many different sensory perceptions ranging from taste and olfaction to texture. 7 Wine is a mixture of thousands of molecules that can contribute to its final taste, 8 and its composition varies greatly depending on the grapes used, climate and production method. 9 Although the flavor of some of these compounds is very well known, it is really difficult to understand what their role in final taste is. 7,10,11 The relevant role of genetic factors both on alcohol consumption and dependence has been clearly demonstrated by genome-wide association study (GWAS) studies. [12][13][14][15][16] Moreover, studies on the genetic variations in bitter taste receptors have also shown that variations in TAS2R16 and TAS2R38 genes can influence alcohol intake [17][18][19] but not dependence. 19 On the contrary, very little is known about the possible contribution of genetic factors to alcohol preferences in humans. Recen...

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Optimal number of response categories in rating scales: reliability, validity, discriminating power, and respondent preferences

Cited by 1,379 publications

References 39 publications

Are Patients Satisfied With a Web-based Followup after Total Joint Arthroplasty?

Are Patients Satisfied With a Web-based Followup after Total Joint Arthroplasty?

Chinese medicine treatment for menopausal symptoms in the UK health service: Is a clinical trial warranted?

Genome-wide association analysis on five isolated populations identifies variants of the HLA-DOA gene associated with white wine liking

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