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Opinion

Restrict insomniacs’ sleep duration, set rules for time in bed

YOUR DOSE OF MEDICINE - Charles C. Chante MD - The Philippine Star

Reducing bedtime stimulation and, oddly enough, restricting sleep both have powerful, relatively fast effects on insomnia, especially when used in tandem.

Among cognitive-behavioral therapy approaches, they have the best supporting evidence and “happily, are the easiest to do,” the director of the University of California, Berkeley, Golden Bear Sleep and Mood Research Clinic said.

The goal is to teach insomniacs that their beds are for sleeping, not watching TV, surfing the Net, eating potato chips, or fretting about not getting enough sleep.

Sleep restriction limits their time in bed to the time they actually sleep. The first step is to discover that ratio by having patients keep a sleep diary for a week or two. Insomniacs are usually about 60% sleep efficient; for every 8 hours in bed, they’ll sleep about 5.

The next step is limiting bedtime to sleep time. At first, that might cause a bit of sleep deprivation but that’s a good thing because it builds homeostatic pressure to sleep.

The goal is 85% sleep efficiency, 4.25 hours of sleep, for instance, for every 5 hours in bed. As long as patients remain 85% efficient, time in bed can be increased by 15 minutes every 5 or so days. Within about 6 weeks, patients should be getting an efficient 7 or 8 hours of sleep per night.

At first, “we never go less than 5 hours a night” and “make that dependent on safety issues. So, if someone’s truck driver, we probably wouldn’t do this treatment. If someone has bipolar disorder, I wouldn’t go before 6 1/2 hours because sleep deprivation can trigger a manic episode.”

Naps are okay if needed, as long as they are taken before 3 p.m. and last no more than 30 minutes.

Stimulus control reinforces the bed-sleep connection. If patients aren’t asleep within 20 minutes, “Don’t let them clock watch. [Tell them to] get up and move to another room, and stay up until they are really sleepy.”

If they want to read, it shouldn’t be something that will keep them up all night. If they want to watch TV, it should be something relaxing, not channel surfing. If they’re anxious, writing in a journal can help.

“Had patient who said, ‘Oh, I can get some housework done.’ No nothing productive. Other patients say, ‘can get on computer and do some email.’ No; [they need] dim light conditions.”

Flexibility is important. Some patients might want to restrict sleep in the evening, others in the morning. Both are fine. Some patients might worry that 4 hours is too little bedtime, so “start with 7 1/2; it’s better than 8 1/2. Sleep efficiency will pop up a bit, they’ll get confidence. They’ll come down to 7 hours the next week. Just base it on what makes sense for the person.”

It might take a few weeks for patients to see benefits, so support is important, too. Troubleshoot their routine for problems, and encourage them to continue the program.

It’s uncertain what benefit sedative hypnotics such as zolpidem would add to the approach.

BED

BEDTIME

GOLDEN BEAR SLEEP AND MOOD RESEARCH CLINIC

HOURS

PATIENTS

SLEEP

TIME

UNIVERSITY OF CALIFORNIA

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