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["Appendix  Sleep instrument used in the study"]
[]
["Instrument",{"$nulls":5},"Answers"]
["Basic Nordic Sleep Questionnaire (BNSQ)"]
["have you had difficulties in falling asleep during the last month?",{"$nulls":5},"1 never or <ones/mth, 2 <ones/week, 3 1-2 times /week, 4 3-5 times/week, 5 daily or almost daily"]
["how have you slept during the last month?",{"$nulls":5},"1 good, 2 quite good, 3 neither good nor bad, 4 quite bad, 5 poor"]
["how long time do you normaly sleep per night?",{"$nulls":5},"hours"]
["how long time do you need to sleep per night?",{"$nulls":5},"hours"]
["Public health survey  "]
["how often do you feel that you had difficulties in falling asleep",{"$nulls":5},"1 never, 2 seldom or sometimes/year, 3 sometimes/mth, 4 mostly or sometimes/week,  "]
[{"$nulls":6},"5 daily or almost daily"]
["how do you estimate your sleep quality as a hole ",{"$nulls":5},"1 very good, 2 quite good, 3 neither good nor bad, 4 quite bad, 5 very bad"]
["how long time do you normaly sleep ",{"$nulls":5},"hours and minutes"]
["how long time do you need to sleep",{"$nulls":5},"hours and minutes"]
["Intensive care group"]
["how was your overall sleep before the intensive care period?",{"$nulls":5},"1 good, 2 quite good, 3 neither good nor bad, 4 quite bad, 5 poor"]
[]
["The answers were dicotomiced and compared as follows:"]
[" the severity of difficulties in falling asleep; 0=(no) answer 1 and 2 in BNSQ or 1,2 and 3 in public health survey, 1= (yes) answer 3, 4 and 5 in BNSQ or 4 and 5 "]
["in the public health survey"]
["quality of sleep; 0=(good) answer 1, 2 and 3 in BNSQ or 1, 2 and 3 in  the public health survey, 1= (poor) 4 and 5 in BNSQ or 4 and 5 in  the public health survey"]
["sleep deficit; deficit between the normaly sleep time compared to need for sleep, 0= (good) no deficit or need for sleep less than habitually, 1= ( bad) need for sleep"]
[" higher than habitually"]
["There were different internal dropouts in the sleep questionnaire answers."]

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