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use of CL2 design which is more conservative, simpler and easier for patients to maintain. To develop and validate a questionnaire for assessing chewing function of Chinese older adults. The chewing function questionnaire was validated on older adults recruited from a dental hospital, an elderly home and three community centers in Hong Kong. The participants were asked to indicate their ability to chew on each of the 20 selected food items and to self-rate their overall chewing ability. Chewing function was objectively assessed by asking the participant to