TY - JOUR T1 - A comparison of two scoring methods for the King's sarcoidosis questionnaire JF - European Respiratory Journal JO - Eur Respir J DO - 10.1183/13993003.congress-2015.PA832 VL - 46 IS - suppl 59 SP - PA832 AU - Aish Sinha AU - Sabrina Bajwah AU - Harry Gosker AU - Richard Siegert AU - Daniel Creamer AU - Genevieve Larkin AU - Toby Maher AU - Elisabetta Renzoni AU - Athol Wells AU - Irene Higginson AU - Surinder Birring AU - Amit Patel Y1 - 2015/09/01 UR - http://erj.ersjournals.com/content/46/suppl_59/PA832.abstract N2 - The KSQ is a validated quality of life questionnaire (HRQOL) for patients with sarcoidosis. HRQOL can be calculated from patient raw scores or following their transformation to a linear logit scale, which has improved measurement characteristics and sample size calculations. We compared the validity of KSQ using raw scores (KSQraw) with KSQlogit scores in 207 patients with sarcoidosis (184 lung, 54 skin, 45 eye: same cohort published in Patel A et al, Thorax 2013;68:57). Patients completed the following measures KSQ, FAS, SF36, FVC, SGRQ, MRC breathlessness, DLQI (skin QOL), and VFQ025 (eye QOL). KSQraw and KSQlogit scores were highly correlated for all modules and combinations of modules; General Health status (GHS), Lung, Skin, GHS-Lung and GHS-skin; all r=0.94-0.99 and p<0.01. The KSQlogit GHS-Lung score had good internal consistency (αCronbach 0.93),repeatability (ICC 0.93) and correlation with SGRQ total (0.82, p<0.01) and FVC (0.39, p<0.01). This was consistent across all KSQ modules and combination scores (See table 1 for examples). Similarly the eye and medication modules retained validity irrespective of scoring method. View this table:TABLE 1 A comparison of the validity of KSQ module scores with and without logit transformationIn conclusion, the validity of KSQ is comparable whether raw or logit scores are used. We suggest using the logit score as this has the potential to perform better at extremes of HRQOL. ER -