Abstract
Background: The COPD assessment test(CAT),a patient-filled questionnaire,is recommended as part of the assessment of COPD patients.CAT scores in non-COPD population(normative values)have not been studied in Indian population.
Aim: To determine normative values and psychometric properties of CAT questionnaire
Methods: Between Dec 2014-Feb 2015,consecutive subjects undergoing spirometry as part of an annual health screening at P.D.Hinduja Hospital,Mumbai were enrolled to fill up CAT questionnaires.Among non-COPD subjects(postbronchodilator FEV1/FVC≥0.7),normative values and psychometric properties of the test were characterized.
Results: Of 183 subjects undergoing health check-up,161 non-COPD subjects were included.Mean FEV1/FVC ratio was 0.80(SD 0.48);mean predicted FEV1 was 98.6%(SD 15.2).Overall mean CAT score was 9.26(SD 6.38);lower in females(9.06,SD 5.58)and higher in subjects>60 years of age(mean 11.13,SD 7.67).Cronbach alpha for CAT was 0.81,suggesting high internal consistency.Determinants of subjects(39%)having CAT score≥10 compared to those<10 are presented.
| CAT score ≥10 N=62(39%) | CAT score<10 N=95(61%) | p-value(multivariate analysis) | |
| Age,mean(SD) | 47.9(11.3) | 50.1(11.5) | 0.53 |
| Males,n(%) | 42(68%) | 62(65%) | 0.95 |
| Body mass index,mean (SD) | 28.2(4.1) | 26.6(4.9) | 0.03 |
| FEV1 % predicted,mean(SD) | 98.6(16.3) | 98.3(14.3) | 0.62 |
| Smoker,n(%) | 14(22.6%) | 10(10.5%) | 0.04 |
Conclusions: Indians appear to have higher normative values than developed countries.In adjusted analysis,individuals with higher BMI and current smokers had higher CAT scores,suggesting a causal,rather than a cultural reason.
Acknowledgement: The study was funded by“Project Québec-Maharashtra,Relations internationales et de la Francophonie,Quebec”.
- Copyright ©ERS 2015
