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Comparison of Sleep Attitudes and Beliefs among Older Adult Vietnamese Migrants and Australians with and without Insomnia

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Comparison of Sleep Attitudes and Beliefs among Older Adult Vietnamese Migrants and Australians with and without Insomnia Sandra Yung Nguyen, B.Sc., Grad.Dip.Educ.Psych., M.Coun., MAPS MCCOUN College of Health and Biomedicine Victoria University Submitted in partial fulfilment of the requirements of the degree of Doctor of Psychology (Clinical Psychology) 2017 ii ABSTRACT Sleep is an essential part of human life and is associated with both physical and mental health When, where and how people sleep is known to vary across different cultures (Glaskin and Chenhall, 2013) but very little is documented about whether there are significant differences in attitudes and beliefs about sleep across different cultures or different ethnic groups Previous research has found that both dysfunctional beliefs and attitudes about sleep and poor sleep hygiene knowledge can contribute to sleeping problems, especially for those with insomnia As non-pharmacological treatments for insomnia often include addressing cognitive aspects related to sleep it is important that there is a good understanding of how sleep beliefs and attitudes may vary across groups and individuals, including possible ethnic differences However, there has been no research, to the author’s knowledge, investigating the possible differences in sleep attitudes and beliefs between older adult Vietnamese migrants and Australians This study aimed to examine the dysfunctional beliefs and attitudes about sleep, sleep hygiene knowledge and sleep perceptions between these two ethnic groups Sex differences on the dependent variables were also of interest Insomnia status was addressed as it is a possible confound The participants consisted of 207 subjects (100 Vietnamese and 107 Australians) There were 36 males and 54 females for the Vietnamese sample with a mean age of 65.50 years (SD = 5.62) The Australian sample consisted of 50 males and 57 females with a mean age of 68.82 years (SD = 7.32) Phase One of the study examined the psychometric properties, including factor analyses, of a number of new Vietnamese translations of the following self-report instruments; the Insomnia Severity Index, Athens Insomnia Scale, Dysfunctional Beliefs and Attitudes about iii Sleep Scale 16, Sleep Beliefs Scale and Sleep Plots - where the latter assesses how sleep is perceived to vary across the night (Bruck, Dolan and Lack, 2015) Convergent validity between the Insomnia Severity Index and the Athens Insomnia Scale was also analysed The results showed that the Vietnamese translated questionnaires had good psychometric properties with good reliability as well as correlations Convergent validity of the Insomnia Severity Index was also good Phase Two investigated the insomnia status as well as sleep attitudes and beliefs between the two ethnic groups as measured by the Dysfunctional Beliefs and Attitudes about Sleep Scale 16, Sleep Beliefs Scale and Sleep Plots The current study found that the Vietnamese sample reported more insomnia, had higher dysfunctional beliefs and attitudes about sleep, had poorer sleep hygiene knowledge and perceived the sleep of a healthy 60 year old differently to the Australian sample’s perceptions (using Sleep Plots) For the Vietnamese sample significant differences were also found between the Insomnia and No Insomnia groups in relation to the perception of their own sleep using Sleep Plots Interestingly, for both Vietnamese and Australian samples and irrespective of their insomnia status, the majority of participants perceived the sleep of a healthy 60 year old and their own sleep to represent a U shape on the Sleep Plots, with no awakenings during the night It is speculated that these differences in the results between the Vietnamese and Australian samples may be related to cultural factors and/or ethnicity or socioeconomic (SES) factors, as insomnia levels were controlled for as far as possible Phase Three compared the insomnia status as well as sleep attitudes and beliefs between males and females across the entire sample The results found no significant difference iv between males and females according to their insomnia level, dysfunctional beliefs and attitudes about sleep, sleep hygiene knowledge and perceptions of sleep The findings are different to previous research where females have been found to report more insomnia than males This study adds to the limited body of research within the Vietnamese population group living in Australia The results suggest that education related to the impact of dysfunctional beliefs and attitudes about sleep, sleep hygiene and perceptions of sleep need to be particularly implemented with Vietnamese older adults as they have more distorted views about sleep than their Australian counterparts It is proposed that an increase understanding and knowledge about sleep will be helpful in the prevention and/or treatment of insomnia in older adult Vietnamese migrants living in Australia v Doctor of Psychology Declaration “I, Sandra Nguyen, declare that the Doctor of Psychology (Clinical Psychology) thesis entitled Comparison of Sleep Attitudes and Beliefs among Older Adult Vietnamese Migrants and Australians with and without Insomnia is more than 40,000 words in length including quotes and exclusive of tables, figures, appendices, bibliography, references and footnotes This thesis contains no material that has been submitted previously, in whole or in part, for the award of any academic degree or diploma Except where otherwise indicated, this thesis is my own work.” Signature: Date: 15/06/2017 vi Acknowledgements Part of the Australian participants’ data was collected by Honours student Paul Iannacone and has been written up as an Honours thesis, with different research questions, and the data is used with his permission I would like to thank my supervisor, Professor Dorothy Bruck, for her dedication, support and encouragement throughout this research Without her commitment and assistance this would not have been possible I am truly and deeply thankful to her I would like to also thank everyone who participated in this research, without you this research would not have been possible Thank you to my friends and family who assisted in the recruitment of participants for this research I would also like to thank my fellow Doctorate/Masters students for all their support and encouragement through my studies It has been invaluable to be able to debrief throughout the course Lastly, my greatest appreciation and gratitude goes to my family for all their support, encouragement and understanding Thank you to my parents, Dieu and Minh Nguyen, who have not only supported me unconditionally with my studies but also through my life I have appreciated all your advice, love and sacrifice Thank you to my children, Lily and Jordan, who have brought me so much joy during periods of stress Finally, thank you to my wonderful husband, Giuliano, who has been so supportive, loving and encouraging of my decision to return to study I could not have done this without you! I truly appreciate and value all your understanding, commitment and sacrifice vii TABLE OF CONTENTS ABSTRACT ii LIST OF FIGURES ix LIST OF TABLES x PERSONAL INTRODUCTORY COMMENTS xiii Chapter 1: Literature Review 1.1 Introduction 1.2 Normal sleep and changes with age 1.3 Insomnia causes, consequences and classifications 1.4 Some theories of insomnia 1.5 Definitions of culture and ethnicity 12 1.6 Socioeconomic status (SES) and sleep 15 1.7 Cultural beliefs about sleep 17 1.8 Cultural model and health 20 1.9 Sex differences and insomnia 22 1.10 Psychological interventions in sleep 25 1.11 Past research on dysfunctional beliefs and attitudes about sleep 33 1.12 Research on sleep hygiene knowledge 37 1.13 Past research on sleep plots 39 1.14 The current study, conclusions and rationale 41 1.15 Aims and hypothesis 44 Chapter 2: Methodology 46 2.1 Participants 46 2.2 Materials 46 2.3 Procedure 52 2.4 Translation process 53 2.5 Data analysis 54 Chapter 3: Results 57 3.1 Phase One: Psychometric properties of scales 57 3.2 Phase Two: Comparison of Vietnamese and Australian older adult participants with respect to their sleep attitudes and beliefs 77 3.3 Phase Three: Comparison of sex differences between Vietnamese and Australian older adults on the ISI, DBAS16, SBS and Sleep Plots 110 Chapter 4: Discussion 121 viii 4.1 Phase One: Translated Scales 121 4.2 Phase Two: Hypothesis Testing regarding Ethnicity 125 4.3 Sex differences 135 4.4 Limitations and directions for future research 140 4.5 Summary and Conclusions 143 References 149 Appendix A: Information to Participants 169 Appendix B: Dysfunctional Beliefs and Attitudes about Sleep Scale 16 171 Appendix C: Insomnia Severity Index 173 Appendix D: Sleep Beliefs Scale 174 Appendix E: Athens Insomnia Scale 175 Appendix F: Sleep Plot 176 Appendix G: Ethics Approval Letter (by email) 178 Appendix H: Post hoc analysis of sex differences between the Vietnamese and Australian samples according to the DBAS 16 179 Appendix I: Post hoc analysis of sex differences between the Vietnamese and Australian samples according to the SBS 183 Appendix J: Post hoc analysis of sex differences between the Vietnamese and Australian samples according to the Sleep Plots 187 Appendix K: Comparison of items on the DBAS 16 across factors between Morin, Vallieres & Ivers (2007), the Vietnamese and Australian samples 192 Appendix L: Comparison of items on the SBS across factors between Adan et al., (2006), the Vietnamese and Australian samples 193 Appendix M: Dysfunctional Beliefs and Attitudes about Sleep Scale 16 (Vietnamese) 194 Appendix N: Insomnia Severity Index (Vietnamese) 198 Appendix O: Sleep Beliefs Scale (Vietnamese) 200 Appendix P: Athens Insomnia Scale (Vietnamese) 202 Appendix Q: Sleep Plot (Vietnamese) 204 ix LIST OF FIGURES Figure 1.1 Sleepcycle…………………………………………………………………3 Figure 1.2 The PEN-3 cultural model……………………………………………….21 Figure 2.1 Blank Sleep Plot……………………………………………………… 49 x LIST OF TABLES Table 2.1 Illustrative group comparisons for Phase …………………………………53 Table 3.1 Reliability coefficients for both the Vietnamese and Australian samples across the different scales………………………………………………………… 55 Table 3.2 Factor loadings for each question of the ISI-V and ISI-A………………… 57 Table 3.3 ISI-V and ISI-A reliability (Cronbach’s α) for the seven items when one item is deleted…………………………………………………………… …… 58 Table 3.4 ISI-V Correlations between the items……………………………………….58 Table 3.5 ISI-A Correlations between the items……………………………………….59 Table 3.6 Factor loadings for each item of the AIS……………………………………60 Table 3.7 AIS-V reliability (Cronbach’s α) for the seven items when one item is deleted…………………………………………………… 61 Table 3.8 ASI-V correlations between the items……………………………….………61 Table 3.9 Factor loadings for each item of the DBAS16-V and DBAS16-A………….64 Table 3.10 DBAS16-V and DBAS16-A reliability (Cronbach’s α) for the 16 items when one item is deleted………………………………………………… …… 66 Table 3.11 Factor loadings for each variable of the SBS-V and SBS-A…………….… 69 Table 3.12 SBS-V and SBS-A reliability (Cronbach’s α) for the seven items when one item is deleted…………………………………………………………….….71 Table 3.13 Descriptive statistics and summary of analyses of the Mann-Whitney for each ISI item as a function of ethnicity group…………………………… ….….76 Table 3.14 Frequencies of Insomnia and No Insomnia for Vietnamese and Australian samples………………………………………………………………… … 77 Table 3.15 Descriptive statistics and summary of analyses of the Mann-Whitney for each DBAS 16 item as a function of their insomnia status (Insomnia or No Insomnia) for the Australian sample…………………………….……79 Table 3.16 Descriptive statistics and summary of analyses of the Mann-Whitney for each DBAS 16 item as a function of their insomnia status (Insomnia or No Insomnia) for the Vietnamese sample……………………………… …… 81 Sleep attitudes and beliefs 191 Frequencies of different categories of sleep plots between males and females about perception of one’s own sleep for Vietnamese Male Female Total U Shape Non U No Wake Non U Wake Total Count 14 22 Expected Count 13.2 4.4 4.4 Count 31 10 12 Expected Count 31.8 10.6 10.6 Count 45 15 15 53 75 Sleep attitudes and beliefs 192 Appendix K: Comparison of items on the DBAS 16 across factors between Morin, Vallieres & Ivers (2007), the Vietnamese and Australian samples Morin Items F1 Vietnamese F2 F3 Consequences Worry Sleep of sleep about F4 F1 F2 Australian F3 F4 F1 F2 F3 Medication expectations sleep √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ 10 √ √ 11 √ √ 12 √ √ 16 √ √ √ √ √ √ √ 15 √ √ 13 14 √ √ √ √ √ √ F4 Sleep attitudes and beliefs 193 Appendix L: Comparison of items on the SBS across factors between Adan et al., (2006), the Vietnamese and Australian samples Adan Items F1 Sleep incompatible behaviours √ Vietnamese F3 F1 F2 F3 Thoughts and attitudes to sleep √ √ √ F2 Sleepwake behaviours F4 Australian F1 F2 F3 √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ 12 √ √ 14 √ √ 17 √ √ √ √ √ √ √ 19 √ 20 √ √ √ √ 18 √ √ √ 15 16 √ √ 11 13 √ √ √ 10 √ √ F4 √ √ √ √ √ √ √ √ √ Sleep attitudes and beliefs 194 Appendix M: Dysfunctional Beliefs and Attitudes about Sleep Scale 16 (Vietnamese) Several statements reflecting people's beliefs and attitudes about sleep are listed below Please indicate to what extent you personally agree or disagree with each statement There is no right or wrong answer For each statement, circle the number that corresponds to your own personal belief Please respond to all items even though some may not apply directly to your own situation Dưới số câu thể niềm tin thái độ người giấc ngủ Xin cho biết cá nhân quý vị đồng ý hay không đồng ý mức độ câu Khơng có câu trả lời hay sai Đối với câu, khoanh tròn số tương ứng với niềm tin cá nhân quý vị Xin trả lời tất câu số câu khơng có liên hệ trực tiếp tới hồn cảnh riêng q vị Strongly Disagree Hồn tồn khơng đồng ý Strongly Agree Hoàn toàn đồng ý 10 I need hours of sleep to feel refreshed and function well during the day Tôi cần ngủ để cảm thấy sảng khối hoạt động tốt ngày 10 When I don't get proper amount of sleep on a given night, I need to catch up on the next day by napping or on the next night by sleeping longer Khi không ngủ đủ vào đêm hơm sau tơi phải ngủ bù cách ngủ trưa ngủ lâu vào đêm sau 10 Sleep attitudes and beliefs 195 I am concerned that chronic insomnia may have serious consequences on my physical health Tôi lo chứng ngủ kinh niên có hậu nghiêm trọng sức khỏe thể 10 10 I am worried that I may lose control over my abilities to sleep Tôi lo tơi kiểm sốt khả ngủ After a poor night’s sleep, I know it will interfere with my activities the next day Sau đêm ngủ kém, tơi biết ảnh hưởng tới hoạt động vào ngày hôm sau 10 In order to be alert and function well during the day, I believe I would be better off taking a sleeping pill rather than having a poor night’s sleep Để tỉnh táo hoạt động tốt ban ngày, tin nên uống thuốc ngủ thay có đêm ngủ khơng đủ 10 When I feel irritable, depressed, or anxious during the day, it is mostly because I did not sleep well the night before Khi cảm thấy cáu kỉnh, trầm cảm, lo âu ban ngày, chủ yếu đêm trước ngủ không ngon 10 When I sleep poorly one night, I know it will disturb my sleep schedule for the whole week Khi ngủ đêm, tơi biết làm xáo trộn thời gian ngủ tuần 10 Sleep attitudes and beliefs 196 Without an adequate night’s sleep, I can hardly function the next day Nếu không ngủ đủ ban đêm, hoạt động vào ngày hôm sau 10 10 I can’t ever predict whether I’ll have a good or poor night’s sleep Tơi khơng đốn trước tơi có đêm ngủ ngon hay ngủ khơng ngon giấc 10 11 I have little ability to manage the negative consequences of disturbed sleep Tơi có khả kiểm soát hậu tiêu cực giấc ngủ bị xáo trộn 10 12 When I feel tired, have no energy, or just seem not to function well during the day, it is generally because I did not sleep well the night before Khi cảm thấy mệt mỏi, khơng có sức, khơng hoạt động tốt vào ban ngày, thường đêm trước ngủ không ngon 10 10 13 I believe insomnia is essentially the result of a chemical imbalance Tôi tin bản, chứng ngủ thiếu cân hóa học 14 I feel insomnia is ruining my ability to enjoy life and prevents me from doing what I want Tôi cảm thấy chứng ngủ hủy hoại khả hưởng thụ sống ngăn cản làm điều muốn 10 Sleep attitudes and beliefs 197 15 Medication is probably the only solution to sleeplessness Có thể thuốc giải pháp cho chứng ngủ 10 10 16 I avoid or cancel obligations (social, family) after a poor night’s sleep Sau đêm ngủ kém, tránh bỏ bổn phận (xã hội, gia đình) Sleep attitudes and beliefs 198 Appendix N: Insomnia Severity Index (Vietnamese) For each question, please CIRCLE the number that best describes your answer Please rate the CURRENT (i.e LAST WEEKS) SEVERITY of your insomnia problem(s) Đối với câu hỏi, xin KHOANH TRÒN số thể câu trả lời quý vị Xin xếp loại MỨC ĐỘ NGHIÊM TRỌNG HIỆN TẠI (tức TRONG TUẦN VỪA QUA) vấn đề ngủ quý vị Insomnia Problem Vấn đề ngủ None Không Mild Nhẹ Severe Nặng Very Severe Rất nặng Moderate Tương đối nặng Difficulty falling asleep Khó dỗ giấc ngủ Difficulty staying asleep Khó giữ giấc ngủ Problems waking up too early Dậy sớm 4 4 How SATISFIED/DISSATISFIED are you with your CURRENT sleep pattern? Q vị HÀI LỊNG/KHƠNG HÀI LỊNG mức độ với giấc ngủ HIỆN NAY mình? Very Satisfied Satisfied Moderately Satisfied Dissatisfied Very Dissatisfied Rất hài lòng Hài lòng Tương đối hài lòng Khơng hài lòng Rất khơng hài lòng How NOTICEABLE to others you think your sleep problem is in terms of impairing the quality of your life? Về việc bị giảm chất lượng sống, quý vị nghĩ người khác DỄ NHẬN THẤY vấn đề khó ngủ quý vị mức nào? Not at all Noticeable A Little Somewhat Much Very Much Noticeable Không dễ nhận thấy Một chút Tương đối Dễ Rất dễ nhận thấy Sleep attitudes and beliefs 199 How WORRIED/DISTRESSED are you about your current sleep problem? Quý vị LO LẮNG/BUỒN BỰC mức vấn đề khó ngủ mình? Not at all Worried A Little Somewhat Much Very Much Worried Không lo lắng Một chút Tương đối Nhiều Lo lắng nhiều To what extent you consider your sleep problem to INTERFERE with your daily functioning (e.g daytimefatigue, mood, ability to function at work/daily chores, concentration, memory, mood, etc.) CURRENTLY? HIỆN TẠI, q vị coi vấn đề khó ngủ GÂY TRỞ NGẠI mức độ hoạt động hàng ngày (ví dụ: ban ngày mệt mỏi, tính khí, khả làm việc/thực công việc hàng ngày, tập trung ý, trí nhớ, vvv) Not at all Interfering A Little Somewhat Much Very Much Interfering Không trở ngại chút Một chút Tương đối Nhiều Rất nhiều trở ngại Sleep attitudes and beliefs 200 Appendix O: Sleep Beliefs Scale (Vietnamese) This is a survey of the effects of selected behaviours upon sleep We are interested in knowing your opinion about whether any of these behaviours may influence the quality and/or quantity of sleep For the following list of behaviours, please indicate whether you believe they produce a ‘positive’ effect, a ‘negative’ effect, or ‘neither’ effect on sleep Please not make reference to how they influence your sleep in particular, but to the effects you think these behaviours have on people in general Please answer ALL the statements by ticking the appropriate box, even if you are not completely sure of the answer Đây nghiên cứu tác động số hành vi chọn lọc giấc ngủ Chúng muốn biết ý kiến quý vị để xem số hành vi này, liệu có hành vi ảnh hưởng tới chất lượng và/hoặc số lượng giấc ngủ Với danh sách hành vi sau đây, xin cho biết quý vị có cho chúng tạo tác động 'tích cực', tác động 'tiêu cực', hay 'khơng' có tác động giấc ngủ Xin đừng nói việc chúng ảnh hưởng tới giấc ngủ riêng quý vị, mà nói quý vị nghĩ hành vi có tác động người nói chung Xin trả lời TẤT CẢ câu cách đánh dấu vào ô phù hợp, q vị khơng hồn tồn chắn câu trả lời Drinking alcohol in the evening Uống rượu vào buổi tối Drinking coffee or other substances with caffeine after dinner Uống cà phê đồ uống khác có chứa chất ca- phê-in sau bữa tối Doing intense physical exercise before going to bed Tập thể dục cường độ mạnh trước ngủ Taking a long nap during the day Ngủ giấc dài vào ban ngày Going to bed and waking up always at the same hour Luôn ngủ dậy vào Thinking about one’s engagements for the next day before falling asleep Positive effect Neither effect Negative effect Tác động tích cực Khơng có tác động Tác động tiêu cực Sleep attitudes and beliefs 201 Suy nghĩ công việc phải làm ngày hôm sau trước ngủ thiếp Using sleep medication regularly Thường xuyên sử dụng thuốc ngủ Smoking before falling asleep Hút thuốc trước ngủ Diverting one’s attention and relaxing before bedtime Chuyển hướng ý thư giãn trước ngủ 10 Going to bed hours later than the habitual hour Đi ngủ trễ tiếng so với thường lệ 11 Going to bed with an empty stomach Bụng đói ngủ 12 Using the bed for eating, calling on the phone, studying and other non-sleeping activities Dùng giường ngủ để ăn uống, gọi điện thoại, học hoạt động khác ngủ 13 Trying to fall asleep without feeling tired Cố gắng ngủ chưa buồn ngủ 14 Studying or working intensely until late at night Học làm việc với cường độ mạnh đến tận khuya 15 Getting up when it is difficult to fall asleep Dậy khó ngủ 16 Going to bed hours earlier than the habitual hour Đi ngủ sớm so với thường lệ 17 Going to bed immediately after eating Đi ngủ sau ăn 18 Being worried about the impossibility of getting enough sleep Lo lắng việc ngủ đủ 19 Sleeping in a quiet and dark room Ngủ phòng tối yên tĩnh 20 Recovering lost sleep by sleeping for a long time Ngủ bù cách ngủ thật lâu Sleep attitudes and beliefs 202 Appendix P: Athens Insomnia Scale (Vietnamese) Instructions: This scale is intended to record your own assessment of any sleep difficulty you might have experienced Please, check (by circling the appropriate number) the items below to indicate your estimate of any difficulty, provided that it occurred at least three times per week during the last month Chỉ dẫn: Phương pháp đo lường để ghi lại thẩm định riêng quý vị khó khăn mà quý vị gặp phải giấc ngủ Xin đánh dấu (bằng cách khoanh tròn số phù hợp) câu để thể ước lượng quý vị khó khăn nào, với điều kiện xảy ba lần tuần tháng vừa qua Sleep induction (time it takes you to fall asleep after turning-off the lights) Dỗ giấc ngủ (thời gian để quý vị ngủ thiếp sau tắt đèn) 0: No problem 1: Slightly delayed sleep at all 0: Khơng khó 1: Hơi lâu 2: Markedly delayed 3: Very delayed or did not 2: Tương đối lâu 3: Rất lâu không ngủ chút 1: Minor problem 2: Considerable problem 3: Serious problem or did not 1: Bị nhẹ 2: Bị tương đối nặng 3: Bị nặng không ngủ Awakenings during the night Thức dậy đêm 0: No problem sleep at all 0: Không bị chút Final awakening earlier than desired Thức dậy lần cuối sớm mong muốn 0: Not earlier at all 0: Không sớm ngủ chút 1: A little earlier 2: Markedly earlier 3: Much earlier or did not sleep 1: Sớm chút 2: Sớm đáng kể 3: Sớm nhiều khơng Total sleep duration Tồn thời gian ngủ 0: Sufficient sleep at all 0: Đủ chút 1: Slightly insufficient 2: Markedly insufficient 3: Very insufficient or did not 1: Hơi thiếu 2: Thiếu đáng kể 3: Rất thiếu không ngủ Sleep attitudes and beliefs 203 Overall quality of sleep (no matter how long you slept) Chất lượng giấc ngủ nói chung (bất kể quý vị ngủ bao lâu) 0: Satisfactory not sleep at all 0: Hài lòng 1: Slightly unsatisfactory 2: Markedly unsatisfactory 3: Very unsatisfactory or did 1: Hơi không hài lòng 2: Tương đối khơng hài lòng 3: Rất khơng hài lòng khơng 2: Markedly decreased 2: Giảm đáng kể 3: Very decreased 3: Rất giảm sút ngủ chút Sense of well-being during the day Cảm tưởng sức khỏe ngày 0: Normal 0: Bình thường 1: Slightly decreased 1: Hơi giảm Functioning (physical and mental) during the day Hoạt động (thân thể tinh thần) ngày 0: Normal 0: Bình thường 1: Slightly decreased 1: Hơi giảm 2: Markedly decreased 2: Giảm đáng kể 3: Very decreased 3: Rất giảm sút 2: Considerable 2: Tương đối 3: Intense 3: Dữ dội Sleepiness during the day Cảm giác buồn ngủ ngày 0: None 0: Không 1: Mild 1: Hơi Sleep attitudes and beliefs 204 Appendix Q: Sleep Plot (Vietnamese) 1a Show us your understanding of the nature of a normal night of sleep for a healthy 60 year old Please this by drawing a continuous line in the box below across the normal night time period Start the line at the X in the upper left corner, representing the start of the night’s sleep, and stop the line at the X in the upper right hand corner of the box, representing awakening in the morning The dashed horizontal line between awake above and sleep below marks the transition point between awake and asleep The darker bands indicate deeper sleep With this continuous line indicate your understanding of the progress through the night of a normal sleep of a healthy 60 year old Hãy cho biết quan niệm quý vị đặc điểm đêm ngủ bình thường người 60 tuổi khỏe mạnh Xin làm việc cách vẽ đường kẻ liên tục ô suốt quãng thời gian ban đêm bình thường Bắt đầu vẽ đường kẻ từ dấu chấm góc trái phía trên, thể lúc bắt đầu ngủ ban đêm, dừng đường kẻ dấu chấm góc phải phía ơ, thể lúc tỉnh dậy vào buổi sáng Đường kẻ ngang ngắt quãng lúc tỉnh bên lúc ngủ bên đánh dấu lúc chuyển đổi lúc ngủ lúc thức Vùng tối thể giấc ngủ sâu Bằng đường kẻ liên tục này, cho biết quan niệm quý vị tiến triển suốt đêm giấc ngủ bình thường người 60 tuổi khỏe mạnh Awake X (Thức) Night λ Asleep(Nủ) Light Sleep Deep Sleep (Ngủ sâu) Very Deep (Ngủ sâu) Sleep Awake X (Thức) λ Morning Sleep attitudes and beliefs 205 1b Now please show us your understanding of the nature of your own typical night’s sleep Think about how you have slept over the last two weeks Please this using the same method of drawing as in the above sleep plot, however the continuous line should indicate your own typical sleep Bây giờ, xin cho biết quan niệm quý vị đặc điểm giấc ngủ đêm điển hình q vị Hãy nhớ lại xem q vị ngủ hai tuần vừa qua Xin làm điều sử dụng phướng pháp vẽ giống đồ thị giấc ngủ phía trên, có điều đường kẻ liên tục lần thể giấc ngủ điển hình q vị Awake X (Thức) Night λ Asleep(Nủ) Light Sleep Deep Sleep (Ngủ sâu) Very Deep (Ngủ sâu) Sleep Awake X (Thức) λ Morning

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