Survey on Obesity and Weight ManagementBack

Research Background

In March 2015, Ogilvy CommonHealth Mind Resource commissioned the Public Opinion Programme (POP) of The University of Hong Kong to conduct this “Survey on Obesity and Weight Management” targeting Cantonese speaking Hong Kong citizens of age 18-60. The survey aimed to gauge Hong Kong citizens’ awareness on obesity and related chronic diseases, as well as their opinions on weight management.

The research instrument used in this study was designed entirely by the POP Team after consulting Ogilvy CommonHealth Mind Resource, while both POP and Ogilvy CommonHealth Mind Resource had equal say in the final instrument. Moreover, fieldwork operations, data collection and data analysis were conducted independently by the POP Team, without interference from any party. In other words, although the content of the questionnaire mainly came from the commissioning organization, POP was given full autonomy to design and conduct the survey, and POP would take full responsibility for all the findings reported herewith.

Research Design

Telephone interviews were conducted by interviewers under close supervision. All data were collected by our interviewers using a Computer Assisted Telephone Interview (CATI) system invented by the research team which allowed real-time data capture and consolidation. To ensure data quality, on top of on-site supervision, voice recording, screen capturing and camera surveillance were used to monitor the interviewers' performance.

Telephone numbers are randomly generated using known prefixes assigned to telecommunication services providers under the Numbering Plan provided by the Office of the Communications Authority (OFCA). Invalid numbers are then eliminated according to computer and manual dialing records to produce the final sample.

The target population of this survey was Cantonese-speaking Hong Kong citizens aged 18-60. If more than one eligible subject had been available, selection was made using the "next birthday rule" which selected the person who had his/her birthday next. The survey was conducted during the period of April 13 to 24, 2015. A total of 502 respondents were successfully interviewed. The effective response rate of this survey was 72.5%, and the standard sampling error for percentages based on this sample was less than 2.2 percentage points. In other words, the sampling error for all percentages using the total sample was less than plus/minus 4.5 percentage points at 95% confidence level.

Research team members

Research Directors :	Project Manager :	Project Executive:	Data Analysts :
CHUNG Ting-Yiu Robert and PANG Ka-Lai Karie	LEE Wing-Yi Winnie	LI Kin-Wing Jasmine	TAI Chit-Fai Edward and HUANG Ka-Wai Alex

Contact Information

Survey date	:	13-24/4/2015
Target population	:	Cantonese-speaking Hong Kong citizens aged 18-60
Survey method	:	Random telephone survey conducted by real interviewers
Sampling method	:	Telephone numbers are randomly generated using known prefixes assigned to telecommunication services providers under the Numbering Plan provided by the Office of the Communications Authority (OFCA). Invalid numbers are then eliminated according to computer and manual dialing records to produce the final sample. If more than one eligible subject had been available, the one who had his/her birthday next was selected.
Sample size	:	502 successful cases
Effective response rate	:	72.5% (based on the number of eligible target respondents)
Standard error	:	Less than 2.2% (i.e. at 95% confidence level, the maximum sampling error of all percentages should be no more than +/-4.5 percentage points)

Frequency Report (Chinese pdf format only)

Questionnaire (Chinese pdf format only)

Press release prepared by sponsor (Chinese pdf format only)

Presentation slides prepared by sponsor (Chinese pdf format only)