Table 3 Summary of comments and modifications for content and face validation based on comments from experts and target population (n = 4)

1

To give examples to define eating event

The original definition was stated as “The term ‘eating event’ refers to any time you eat something that contains calories. For example, this could be a meal, a snack, or a drink.”

Examples of eating events was added after the definition “The term ‘eating event’ refers to any time you eat something that contains calories. For example, this could be a meal, a snack, or a drink. (e.g. Nasi lemak, biscuit/cookies, a cup of Milo)”

2

Usage of terms to define sleep

The original item was “What time do you fall asleep?”

It has been modified to “What time do you go to bed?”

3

To simplify the statement for better understanding

The original item was stated “How often do you wake up in the night to eat?”

It has been simplified to “How often do you wake up at night to eat?”

4

Correcting the usage of grammar

The original item was “How often do you take naps in the day?”

It has been modified to “How often do you take naps during the day?”

5

To indicate answer must be in hours and minutes. HH:MM

No instructions for answering format of time was given.

The statement “Please indicate A.M./P.M. as part of your response.” was added for items that required time as an answer.