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Table 2 Non-response in the study population. No answer (NA) is due to an item non-response or to the self-administered questionnaire (SAQ) not filled out (rows in grey). Complete cases are individuals with all socio-economic (SE) and/or mental health (MH) indicators answered. Weighted percentages

From: Non-response bias in the analysis of the association between mental health and the urban environment: a cross-sectional study in Brussels, Belgium

 

Initial samplea

SAQ subset°

Obs

%

Obs

%

Initial sample

4355

100.00%

  

NA Reported household income (SE)

766

16.93%

  

NA Age (SE)

0

0.00%

  

NA Gender (SE)

0

0.00%

  

NA Family composition (SE)

399

8.95%

  

NA Highest educational level in the household (SE)

144

2.84%

  

NA Self-reported depression (MH)

44

1.03%

  

SAQ required but not available

842

18.97%

  

SAQ not required and not available

760

16.51%

  

SAQ not required but available

110

2.50%

  

SAQ required and available

2643

62.02%

  

     SAQ available

 

64.52%

2753

100.00%

     NA General Health Questionnaire (GHQ-12) (MH)

1723

38.17%

121

2.70%

     NA Energy level (SF-36 ‘vitality scale’) (MH)

1918

42.80%

316

7.33%

     NA Depressive disorder (MH)

1793

39.51%

191

4.04%

     NA Anxiety disorder (MH)

1801

39.75%

199

4.27%

     NA Sleeping disorder (MH)

1811

39.91%

209

4.44%

Complete case for mental health

2285

53.93%

  

Complete case for mental health and socio-economic

1929

45.92%

  
  1. a whole study population; ° participants with SAQ available