Health questionnaire analysis and development of satisfaction questionnaire for patients treated with extracorporeal shock wave lithotripsy (SATISLIT).
INTRODUCTION
Due to the absence of specific instruments to study the psychosocial sphere of patients undergoing extracorporeal shock wave lithotripsy (SWL), the objective of this study is to develop a satisfaction questionnaire regarding the SWL treatment from a health questionnaire which was already designed and had been previously validated.


MATERIAL AND METHODS
The design of the satisfaction questionnaire was carried out in 5 phases, based on a previously validated health scale in patients treated with SWL (ESPTL), including a total cohort of 135 patients treated at our center who received a phone interview. Phase 1: descriptive analysis of the series and scores of the 8 items of ESPTL. Phase 2: U-Mann Whitney comparison of ESPTL based on the patients' sex. Phase 3: study of ESPTL correlation with age using Spearman's Rho. Phase 4: grouping by factors of ESPTL, comparison by sex and correlation with age, as performed in phases 2 and 3 with the global score. Phase 5: obtaining the satisfaction subscale -SATISLIT-, descriptive analysis, comparison according to sex, correlation with age and linear regression model of SATISLIT with respect to ESPTL.


RESULTS
135 patients, 85(63%) men, 50(37%) women. Median (minimum-maximum) age 56 (27-79) and ESPTL score 31 (8-39). Differences in global ESPTL score between men and women (p <.001), as well as in items 1 (p =.029), 3 (p =.002), 6 (p =.006), 7 (p =.005) and 8 (p =.025). Non-significant correlation of ESPTL regarding age. Significant correlation in items 2, 4, 5 and 8 but, very weak (<0.2). 4 factors, each one with 2 items, with statistically significant differences regarding sex in F2 (p =.001), F3 (p =.007) and F4 (p =.001). Significant correlation with age only in F1 and F3, but very weak (<0.2). Median (minimum-maximum) SATISLIT 18 (4-20). Statistically significant differences regarding patients' sex (p =.001). Non- significant correlation with age (p =.836). Significant linear regression of SATISLIT with respect to ESPTL (p <.001).


CONCLUSIONS
Based on validated health questionnaire, the present work has provided a new instrument called SATISLIT for assessing patients' satisfaction after treatment with SWL. Future studies with external and temporal validation will be necessary to contrast its real clinical usefulness.
['Hevia|M|M|', 'Robles|J E|JE|', 'Chiva|S|S|', 'Doménech|P|P|', 'García|A|A|', 'Ancizu|F J|FJ|', 'Velis|J M|JM|', 'Rosell|D|D|', 'Diez-Caballero|F|F|', 'Guillén|F|F|', 'Miñana|B|B|', 'Pascual|J I|JI|']
D000328:Adult D000368:Aged D005260:Female D006801:Humans D008096:Lithotripsy D008297:Male D008875:Middle Aged D000073222:Patient Health Questionnaire D017060:Patient Satisfaction D012189:Retrospective Studies
Satisfaction SWL Litotricia Satisfacción Urolithiasis Urolitiasis