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Table 5 Asthma, bronchial hyperresponsiveness and atopy in the two birth cohorts.

From: Prevalence of non-communicable diseases in Brazilian children: follow-up at school age of two Brazilian birth cohorts of the 1990's

Variables

 

Ribeirão Preto

 

São Luís

P value

 

n

% weighted*

n

% weighted*

 

Wheezing in the last 12 months

    

0.957

Yes

60

18.0

58

17.8

 

No

268

82.0

270

82.2

 

Missing

-

-

2

-

 

Bronchial hyperresponsiveness **

    

0.069

Yes

135

39.6

111

32.5

 

No

193

60.4

219

67.5

 

Asthma ***

    

0.209

Yes

34

10.2

25

7.3

 

No

294

89.8

305

92.7

 

Atopy ****

    

< 0.001

Positive

142

44.3

81

25.3

 

Negative

185

55.7

242

74.7

 

Missing

1

-

7

-

 
  1. Ribeirão Preto, 2004/05 and São Luís, 2005/06.
  2. * Percentages may not add to 100% because of rounding. Missing values were excluded from percentages and P-value calculations.
  3. ** PC20 ≤2 mg/ml
  4. *** Asthma defined by a subjective criterion (wheezing in the last 12 months) plus an objective criterion (bronchial hyperresponsiveness)
  5. **** Atopy was defined as at least one positive skin test for some allergens