The amount of food items consumed by the respondents in the past week will be recorded by the validated Malay language of Diet History Questionnaire (DHQ) via interview method. The data will be analysed using the Nutritionist Pro TM Diet Analysis Software, then will be compared to the Malaysian Recommended Nutrient intake.

This study will used the validated Malay language version of Mini-Mental State Examination (M-MMSE) questionnaire to assess the cognitive functioning of the respondents. The M-MMSE is an 11-question measure that tests five areas of cognitive function: orientation (2 items), registration (1 item), attention and calculation (1 item), recall (1 item), and language (6 items). The maximum score is 30. A score of 23 or lower is indicative of cognitive impairment.

The well-established Malay language of Lawton Instrumental Activities of Daily Living (IADL) questionnaire will be used to assess the respondents' ability to perform eight daily activities (i.e. ability to use telephone, shopping, preparing meals, housekeeping, doing laundry, using public transport, taking medications, and handling finances). Presence of 'functional disability' will be defined as having difficulty or needing help in at least one of these 8 items IADL activities, while normal functioning will be defined if one can perform all 8 activities independently.

A well-established Malay language of Short Physical Performance Battery (SPPB) will be used for this study to test the respondents' mobility status to evaluate lower limb extremity functioning in three components (balance test, gait speed test and repeated chair stand test). There are three components namely: 1) balance test (the ability to stand for 10 sec with the feet together in the side-by-side, semi-tandem, and tandem positions) 2) gait speed test (time to walk 4 metres) and 3) repeated chair stand test (time to rise from a chair and return to the seated position 5 times). A score ranging from 0 to 4 (0=inability to complete the task; 4=highest level of function) will be scored for each task of SPPB with the sum of these three tests (0-12) reflecting the complete measurement of physical function. Thus, lower scores on the SPPB reflect higher odds of mobility-related disability.

The Malay language of Berg Balance Scale (BBS) will be used to assess the risk of falls among the respondents by assessing the performance of 14 different functional tasks. The different tasks including ability to sit, stand, reach, lean over, turn and look over each shoulder, turn in a complete circle, and step. The BBS, which rates each performance from 0 (cannot perform) to 4 (normal performance), with the total possible score on the BBS is 56, indicating excellent balance. The presence of high risk of falls will be scored within 0-20.

Body Mass Index (BMI) will be calculated as weight (kg) divided by the square of the height (m2) of either standing height or alternative height. The classification for BMI is based on World Health Organization; value of less than 18.5 kg/m2 and more than 24.9 kg/m2 indicates underweight and overweight respectively. Seca 803 Digital Weight Scale will be used to measure body weight of the respondents in light clothing (without shoes) to the nearest 0.1 kilogram. Standing height will be taken using SECA portable stadiometer (SECA-213 model) to the nearest 0.1 centimeter with the subject standing barefoot. Subjects who are found to have kyphosis problem or difficulty to stand straight will be replaced with alternative height (demi-span) measurement using equations developed among Malaysian elderly.

Body part circumference, MUAC will be measured using a flexible non-stretchable tape (SECA-201 model). MUAC is measured to indicate the loss of peripheral muscle mass and is an indicator for upper-body muscle mass and recommended to use to assess the nutritional status of elderly. MUAC need to identify the midpoint of the bare non-dominant arm first, then measure circumference comfortably round the arm at the midpoint. Reading will be taken twice to the nearest 0.1cm and average circumference will be calculated. A MUAC value of less than 23.0 cm for men and 22.0 cm for women indicates loss of peripheral muscle mass.

Body part circumference, CC will be measured using a flexible non-stretchable tape (SECA-201 model). CC measurement is to indicate muscle loss especially in the lower limb and considered a pertinent marker of the nutritional status in the elderly. For CC, the measuring tape will be wrapped comfortably around the calf (non-dominant leg) at the widest part while respondents are sitting down and recorded to the nearest 0.1cm. The criterion to indicate muscle loss, especially in the lower limb was based on the local classification for Malaysian elderly with a value of less than 30.1 cm for men and 27.3 cm for women respectively.

The %TBF refers to the amount of body fat mass in regard to the total body weight expressed as a percentage. It will be determined by the OMRON body fat analyzer (HBF-375 model). Prior to the measurement, respondents will be ensured to remove all metal accessories (i.e. necklace, rings, earrings, watch, cell phones and bracelets) that might interfere the reading. Information like age, gender and height will be set into the analyzer. Respondents will be required to stand on weighing platform with bare feet in contact with the metal parts while both hands holding tightly the grip electrodes with outstretched arms. The %TBF of the respondents will be classified into certain ranges for person 18 years of age and older. %TBF that is low than 5 and 8 indicate too low muscle while more than 25 and 32 indicate too high for male and female respectively.