Participation Rates, Quality of Sampling Frames and Sampling Fractions in the MONICA Surveys

Appendix 1b

(See Sections 3.3 and 6.2 and Appendices 1a and 1c.)


Please complete this form for each of your reporting units and return to the MDC so that it is received there by 31 January 1993.

SAMPLE SIZE IN THE 2nd MONICA SURVEY

1. MCC name:____________________________________ Code: |____|____|
2. Reporting unit name: _____________________________ Code: |____|____|
3. Please complete the numbers of subjects in the cells of the following table. Use the same definition of age which you used when the sample was selected. Do not leave any cells blank. If the number for some cell is zero, print "0". If the information for some cell is not available, print "N.A." and explain in item 6.
  Men
  25-34     35-44     45-54     55-64     25-64     35-64  
A. Original sample size            
B. Not eligible            
C. Eligible sample size   (C=A-B)            
D. Non-responders            
E. Responders   (E=C-D)            
F. Participation rate (%)   (F=100E/C)            

 

  Women
  25-34     35-44     45-54     55-64     25-64     35-64  
A. Original sample size            
B. Not eligible            
C. Eligible sample size   (C=A-B)            
D. Non-responders            
E. Responders   (E=C-D)            
F. Participation rate (%)   (F=100E/C)            

 

yes no
4. Was your definition of eligibility to the sample the same as in MONICA Manual (see overleaf)? If not, describe the difference:


|___| |___|
yes no
5. Was the definition of eligibility the same as in the 1st survey? |___| |___|
6. Comments:




7. Name of person providing the information: ____________________________________________
Date: _____/_____/_____
  day    month  year

ELIGIBILITY FOR THE SAMPLE, RESPONDERS AND NON-RESPONDERS


For data collection purposes, those selected for the original sample will fit into one of three categories: non-eligibles, responders and non-responders. Every individual selected for the original sample is a member of exactly one of these three categories.

Non-eligibles

In principle, the sample should be selected from the 25-64 (25-34 optional) year old residents of the MONICA Reporting Units. In practice, such sample selection is not usually possible because the sampling frame is not fully updated at the time of the sample selection. The individuals selected in the original sample who died or moved out of the reporting unit area before the survey examination are called non-eligibles. No survey examination should be done on the non-eligibles, and no survey responder or non-responder data should be collected for them.

Note, however, that if a person selected for the age group 25-64 (25-34 optional) of the original sample does not meet the age criteria on the day of examination because it was not possible to assess the exact date of survey examination at the time when the sample was selected, the person should be regarded as eligible for the sample.

The MCC should document the reason for non-eligibility for every non-eligible.

Responders and non-responders

It is important to try to get the full survey core data from as many persons selected and eligible for the sample as possible. Each MCC should develop an algorithm to decide for each subject when sufficient attempts have been made. After the result of the attempts are known, the persons should be classified as responders and non-responders according to the following definition:

The data requirements will be considered separately for responders and non-responders.