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Table 1 Characteristics of Toronto School Children with Asthma Questionnaire and Health Claims Data, 2006a

From: Verifying a questionnaire diagnosis of asthma in children using health claims data

Variable

Respondents

n = 2884

n (%)

Non-respondents

n = 2735

n (%)

P-value

Physician Diagnosis of asthma (n = 5461)

438 (15.71%)

409 (15.34%)

0.73

Male sex (n = 5573)

1459 (50.84%)

1313 (48.58%)

0.09

Mean age in years (n = 4781)

6.75

6.72

0.20

Income adequacy (n = 5241)

  

<0.0001

Lowest income

469 (16.82%)

466 (19.00%)

 

Lower middle

568 (20.37%)

592 (24.14%)

 

Upper middle

577 (20.69%)

624 (25.45%)

 

Highest income

1175 (42.13%)

770 (31.40%)

 

Highest level of education (n = 5421)

  

<0.0001

Less than high school

189 (6.75%)

267 (10.19%)

 

Completed high school

278 (9.92%)

340 (12.98%)

 

Completed postsecondary education

879 (31.37%)

962 (36.73%)

 

Completed post graduate education

1456 (51.96%)

1050 (40.09%)

 

Number of visits to health care provider in the last year (n = 5237)

  

<0.0001

0

678 (24.85%)

742 (29.57%)

 

1-4

1471 (53.92%)

1213 (48.35%)

 

>=5

579 (21.22%)

554 (22.08%)

 

Physician visits in last year (n = 5237)

  

<0.0001

No regular physician

678 (24.85%)

742 (29.57%)

 

Pediatrician only

936 (34.31%)

771 (30.73%)

 

General Practitioner only

486 (17.82%)

375 (14.95%)

 

Pediatrician & General Practitioner

628 (23.02%)

621 (24.75%)

 

Environmental tobacco smoke exposure in home (n = 5383)

302 (10.94%)

328 (12.51%)

0.07

  1. aRespondents are T-CHEQ participants who agreed to health claims data linkage while non-respondents did not agree and are therefore not included in the study population. The T-CHEQ study was a population-based sample.