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Sleep status survey of preschoolers.
| No | Questions |
|---|---|
| Q1.1 | During the past month, what is your child’s usual bedtime from Monday to Friday? |
| Q1.2 | During the past month, what is your child’s usual weekend bedtime? |
| Q2.1 | During the past month, how much is your child nighttime sleep duration per day from Monday to Friday? |
| Q2.2 | During the past month, how much is your child nighttime sleep duration per day on weekends? |
