Quazepam Improves Health-Related Quality of Life and Nocturia in Elderly Japanese Patients with Chronic Insomnia

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Quazepam Improves Health-Related Quality of Life and Nocturia in Elderly Japanese Patients with Chronic Insomnia J Rural Med 2009; 4(1): 1–6 Original article Quazepam Improves Health-related Quality of Life and Nocturia in Elderly Japanese Patients with Chronic Insomnia Hiroyuki Ohbayashi Department of Internal medicine, JA Gifu Tohno-Kousei Hospital, Gifu, Japan Abstract Introduction Aim and background: Chronic insomnia in elderly patients significantly affects their health and quality of life (QOL). Aging often causes serious insomnia, which is accompa- Nocturia also worsens sleep condition. The aim of this study was nied by a decline in the sleep function and disorder of the 1, 2) to evaluate the improvement effects of quazepam, a long-term circadian rhythm in elderly patients . In general, there are acting benzodiazepine, on insomnia and nocturia in elderly four types of sleep disturbance: difficulty in falling sleep, patients. intermittent awakening, early morning awakening and non- Method: Forty-one elderly outpatients (mean age 77.1 ± 5.6 yr) restorative sleep. The latter two types of insomnia are com- suffering from chronic insomnia while on regular a short- or ultra- mon in elderly patients. short-acting hypnotic treatment were enrolled. We prescribed Nocturia sometimes occurs as another aspect of insomnia 7.5–15 mg of quazepam, which was administered regularly by the in elderly patients, even when they have no underlying uro- subjects before bedtime. A questionnaire was used to compared logical disease. A previous study reported that nocturnal changes in quality of sleep and frequency of nocturia for before micturition is often associated with increased insomnia; treatment and at 2 and 4 weeks after initiation of treatment. QOL was also examined using the 36-item Short Form Health Survey of poorer quality of sleep; increased thirst, particularly at night; 3) the Medical Outcomes Study (SF-36). and increased fatigue in the daytime . Results: Thirty-seven subjects (90.2%) completed the study. All As medical doctors, we must base our selection of hyp- subscales of the sleep quality questionnaire improved significantly notic treatment on the four types of sleep disturbance (p<0.001) after 2 weeks, as did the total scores (p<0.001) after 4 described above. However, short-acting or ultra-short-act- weeks. Frequency of nocturia decreased significantly from 3.6 ± ing hypnotics are often prescribed even if the elderly patient 1.7 times to 1.5 ± 0.8 (p<0.001) and 1.2 ± 1.0 times (p<0.001) with insomnia suffers from early morning awakening and after 2 and 4 weeks, respectively. Every SF-36 subscale also non-restorative sleep. showed significant improvement after 4 weeks. The total SF-36 Quazepam (Doral®, Mitsubishi Pharma Corporation, scores of the group showing a decrease in the frequency of Osaka, Japan), a trifluoroethyl benzodiazepine hypnotic with nocturia (>/= 2 times) improved significantly compared with that a half-life of 27 to 41 hours, is effective in inducing and with a frequency of < 2 times (p=0.016). maintaining sleep not only in initial and short-term use but Conclusion: Quazepam significantly improves sleep, QOL and 4, 5) nocturia in elderly patients that respond poorly to short-acting or also in continued use . At doses of 15 to 30 mg, it is as ultra-short-acting hypnotics. effective as flurazepam and triazolam at the normal thera- peutic doses, and there is minimal rebound of insomnia Key words: insomnia, quazepam, quality of life (QOL), nocturia, following withdrawal, unlike rapidly eliminated benzodiaz- elderly patients epines such as triazolam. Previous studies have also (J Rural Med 2009; 4(1): 1–6) concluded that low doses of quazepam (7.5 or 15 mg) are effective and safe for older insomniacs5, 6). Correspondence to: Hiroyuki Ohbayashi In this study, we investigated whether Quazepam could Department of Internal medicine, JA Gifu Tohno-Kousei Hospital, 76- improve both insomnia and nocturnal micturition in elderly 1 Toki-cho, Mizunami City, Gifu Pref. 509-6101, Japan patients, thereby leading to betterment of their QOL. E-mail: [email protected]. ©2009 The Japanese Association of Rural Medicine 2 Methods Table 1 Patient characteristics Subjects and study protocol No. of patients (male/female) 41 (17/24) Mean age (range) (yrs) 77.1 ± 5.6 (65–87) Elderly outpatients aged 65 years or older complaining of Major underlying disease persistent insomnia during regular use of short-acting or Hypertention 15 (36.5%) ultra-short-acting hypnotics were first selected as subjects. Bronchial asthma 8 (19.5%) Primary osteoporosis 7 (17.1%) Inclusion criteria COPD 7 (17.1%) According to the definitions of insomnia in the Diagnos- Diabetes mellitus 2 (4.8%) tic and Statistical Manual of Mental Disorders Fourth edition Heart failure 2 (4.8%) 7) (DSM-IV) and the International Classification of Sleep dis- Hypnotics used previously orders (ICSD)8), the condition of insomnia must occur at least three times a week and persist for more than 4 weeks. Ultra-short-acting hypnotics The subjects were also required to have at least one of the Zolpidem (5 mg/day) 11 (26.8%) Triazolam (0.25 mg/day) 6 (14.6%) following two types of insomnia: intermittent awakening Zopiclone (10 mg/day) 2 (4.9%) and early morning awakening. The patients were also required to be able to understand the contents of the ques- Short-acting hypnotics Brotizolam (0.25 mg/day) 19 (46.3%) tionnaires and complete them without help. Etizolam (1 mg/day) 3 (7.3%) Exclusion criteria COPD: chronic obstructive pulmonary disease. Individuals with a history of alcohol abuse, epilepsy or psychiatric illness, patients who had symptoms of sleep- related breathing disorders such as sleep apnea syndrome and mental health (MH). It is wellknown to be sensitive to and symptoms of restless leg syndrome or periodic limb the severity of insomnia and to be a reliable tool for assess- movement disorder and patients with major underlying dis- ment of the impact of insomnia on QOL9). eases that were unstable were excluded from the study. As a result, 41 elderly outpatients (mean age: 77.1 ± 5.6) Statistical analysis with psychophysiological insomnia were enrolled in the The significance level in this study was set at 5%. Each study. Patient characteristics are shown in Table 1. Prior to set of data is presented as the mean ± SD. Statistical analy- enrollment, all patients received an explanation of the con- ses of the scores for questions in the sleep questionnaire tents of the study. This study was conducted in accordance (Table 3 and Figure 1) and frequency of nocturia (Figure 2) with the principles embodied in the Helsinki Declaration (as compared with those at the time of enrollment were con- revised in Edinburgh 2000). After obtaining their signed ducted by the Wilcoxon rank order method. Each SF-36 informed consent, the 41 patients were initially given 15 mg subscore from after 4 weeks of use of quazepam (Figure 3) of quazepam to take before sleeping. All subjects were also and those of the group that had a reduced mean frequency of instructed that they could reduce the 15 mg of quazepam to nocturia at least 2 times per night and the one patient whose half of the initial administrative dose (7.5 mg), if they felt frequency was less than 2 times (Figure 4) were also com- drowsy or experienced a floating sensation the next day. pared using the Wilcoxon rank order method. The statistical Changes in the quality of sleep were examined before analyses were carried out using JMP version 5.0.1a (SAS and at 2 and 4 weeks after the start of the study using a sleep Institute Inc., Cary, NC, USA). questionnaire that was almost the same as the one used in the development stage of the drug. The contents of the question- Results naire are shown in Table 2. Each subject was also required to record the frequency of nocturnal micturition every night. Thirty seven patients (90.2%) completed the entire study In this study, we also used the 36-item Short Form Health period. Four discontinued due to adverse effects even after Survey of the Medical Outcomes Study (SF-36) before and reducing the dose to half. According to the instructions at 4 weeks after enrollment in the study in order to assess given prior to the start of the study, subjects were allowed to QOL. SF-36 consists of eight subscales that are related to reduce the administrative dose of quazepam to half if they health and functional abilities; physical functioning (PF), felt drowsy or they experienced a floating sensation during physical role (PR), bodily pain (BP), general health (GH), the daytime. As such, 30 subjects reduced the dose to half. vitality (VT), social functioning (SF), role emotional (RE), However, the symptoms persisted for several days in 4 sub- 3 Table 2 Sleep questionnaire Question Answer Score (1) Sleep latency How long did it take you to fall 0–15 minutes 0 asleep after going to bed? 16–30 minutes 1 31–60 minutes 2 More than 60 minutes 3 (2) Total sleep time How long did you sleep for? More than 8 hours 0 7–8 hours 1 6–7 hours 2 6 hours or less 3 (3) Soundness of sleep How sound was your sleep Excellent 0 last night? Good 1 Fair 2 Poor 3 (4) Number of awakenings How many times did you wake up 0 0 last night? 2 1 2–3 2 4 or more 3 (5) Initiating sleep after Did you wake up last night and Excellent 0 nocturnal awakenings could not fall back to sleep again? Good 1 Poor 2 Did not sleep at all 3 (6) Number of dreams Did you have any dreams Excellent 0 last night? Good 1 Poor 2 Did not sleep at all 3 (7) Arising time Did you wake up this morning No 0 earlier than you wanted to? 1 hours or less 1 1–2 hours 2 More than 2 hours
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