The current descriptive-analytical, cross-sectional study was performed in the PM Healthcare Clinic affiliated to Iran University of Medical Sciences in a nine-month period from 24 June 2017 to 3 December 2017. A total of 100 patients with sleep problems were selected based on the inclusion criteria: age above 18 years, literacy, and insomnia. Individuals with a history of mental disorders and use of sleeping medications were excluded.
In the current study, the patients referring to the PM Healthcare Clinic were visited routinely by PM specialists irrespective of their complaint. They were questioned about a set of criteria, including sleep status as specified on the PM medical history sheet. Subsequently, the patients underwent necessary examinations and received proper treatment.
At this stage, eligible patients with sleep difficulty were introduced to the researcher. After explaining the study objectives to the subjects and receiving their signed written informed consent, they were asked to complete the insomnia severity index (ISI). After a month, when the participants had their second visit at the healthcare clinic, the ISI and the patient satisfaction questionnaire were completed by them.
The ISI is a self-report index measuring an individual’s perception of his/her own insomnia. The index consists of five items comprising of the severity of sleep problems, interference of sleep difficulties with daytime functioning, noticeability of sleep problems by others, and distress caused by sleep difficulties. The validity and reliability of the Persian version of the ISI were confirmed by the Sleep Research Center affiliated to Tehran University of Medical Sciences (
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A questionnaire was developed to assess the treatment satisfaction in patients referring to the PM Healthcare Clinic. The questionnaire initially consisted of 22 items in four domains: efficacy, convenience and appropriateness, complications, and overall view on PM therapies. The questionnaire was designed by reviewing similar questionnaires in the literature and applying the comments of PM faculty members. The items were scored based on a five-point Likert scale from completely disagree (scored 0) to completely agree (scored 4). To evaluate the validity of the questionnaire, 10 experts of the field were approached, and CVI (content validity index) and CVR (content validity ratio) were computed. After removing the items with a CVR below 0.6, a total of 16 items remained. The CVIs calculated for the efficacy, convenience, complications, overall view, and the total questionnaire were 0.87, 0.9, 0.8, 0.92, and 0.87, respectively. Concerning the internal consistency, the Cronbach’s alpha was 0.89, 0.88, 0.78, 0.76, and 0.92 for efficacy, convenience, complications, overall view, and the total questionnaire, respectively.
Data were analyzed with SPSS software version 17 and expressed as mean, standard deviation, and frequency. The Wilcoxon signed-rank test was used to compare changes in the scores of insomnia symptoms and ISI items before and after the treatment. Satisfaction with the treatment was reported in terms of the number and frequency of patients for the domains of efficacy, convenience, complications, and overall view. The association between satisfaction in the four domains and demographic characteristics such as age, gender, level of education, and marital status was investigated using chi-square test and Spearman correlation coefficient. The relationship between changes in response to the ISI before and after the treatment and different domains of treatment satisfaction was investigated by Spearman correlation test. The significance level in all tests was set at P < 0.05.