This was a telephone survey conducted by real interviewers under close supervision. HKCSS invited 172 qualified agency members to participate in this survey via emails, end up 64 organizations were interested and their contacts were passed to HKUPOP for telephone interviews.
All data were collected by our interviewers using a Computer Assisted Telephone Interview (CATI) system 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 also used to monitor the interviewers' performance.
The target population of this survey is representatives of local NGOs that provide service to the youth of age 15-24.
The survey was conducted during the period of May 6 to 27, 2013. Representatives of 53 NGOs out of the 64 interested organizations were successfully interviewed. The overall cooperative rate was 91.4%, accounting for 30.8% of the total agency members who are qualified for this survey. Assuming no response bias and calculated at 95% confidence level, the sampling error for all percentages was less than plus/minus 11.5 percentage points.
