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Table 2 Patterns of participation in the Canadian National Population Health Survey over 10 years (1994/1995 -- 2002/2003).

From: Modeling of longitudinal polytomous outcome from complex survey data - application to investigate an association between mental distress and non-malignant respiratory diseases

 

Cycle I

Cycle II

Cycle III

Cycle IV

Cycle V

Frequency

Percent (%)

Participants with no missing values

     

8210

56.75

Participants with one missing values

x

x

x

x

.

2383

16.47

 

x

x

x

.

x

  
 

x

x

.

x

x

  
 

x

.

x

x

x

  
 

.

x

x

x

x

  

Participants with two missing values

x

x

x

.

.

1541

10.65

 

x

x

.

x

.

  
 

x

x

.

.

x

  
 

x

.

x

.

x

  
 

x

.

.

x

x

  
 

.

x

x

x

.

  
 

.

x

x

.

x

  
 

.

x

.

x

x

  
 

.

.

x

x

x

  
 

x

.

x

x

.

  

Participants with three missing values

x

x

.

.

.

1188

8.21

 

x

.

.

.

x

  
 

.

.

.

x

x

  
 

x

.

x

.

.

  
 

.

x

x

.

.

  
 

.

.

x

x

.

  
 

x

.

.

x

.

  
 

.

x

.

.

x

  
 

.

.

x

.

x

  

Participants with four missing values

.

.

.

.

x

1144

7.91

 

x

.

.

.

.

  
 

.

x

.

.

.

  
 

.

.

x

.

.

  
 

.

.

.

x

.

  
  1. x -- indicates that mental distress was recorded at that time point.
  2. . -- indicates that mental distress was missing at that time point.
  3. *There are 247 observations with all missing values. The percentage is calculated with the total of 14466 instead of 14713 (based on the age group 15 years and over).