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Table 2 Weighted prevalence estimates for prevalence and severity of asthma, rhinitis, and eczema by agea

From: Assessing the prevalence and severity of asthma, rhinitis, and eczema among schoolchildren (6–7 and 13–14 years old) in Khuzestan, Iran: a cross-sectional survey

Asthma symptoms

6–7 years (n = 3681)

13–14 years (n = 3663)

P-Valueb

Ever had wheezing

4.5

5.9

 < 0.001c

Wheezing in the last 12 months

3.8

4.4

 < 0.001 c

Number of attacks of wheezing in the last 12 months

None

0.1

0.3

 < 0.001 c

1–3 times

3.1

2.7

4–12 times

0.6

1.1

 > 12 times

0.1

0.4

Sleep disturbance due to wheezing in the last 12 months

None

1.3

1.7

 < 0.001 c

 < Once/week

1.7

1.8

 > Once/week

0.7

0.9

Wheezing limited speech to 1 or 2 words

1.2

1.5

 < 0.001 c

Asthma ever

1.8

3.4

 < 0.001 c

Wheezing occurring during or after exercise

2.2

4.4

 < 0.001 c

Dry night cough at night unrelated to cold/chest infection

4.0

6.7

 < 0.001 c

Rhinitis ever

4.6

6.5

 < 0.001 c

Rhinitis in the last 12 months

4.1

5.6

 < 0.001 c

Burning, itchy, watery eyes

2.6

4.0

 < 0.001 c

Rhinitis affected daily activities

Not at all

0.9

1.0

A little

2.0

2.6

Moderate

0.9

1.3

A lot

0.4

0.6

Ever had hay fever

2.8

4.7

 < 0.001 c

Itchy rash ever

0.8

1.3

 < 0.001 c

itchy rash in the last 12 months

0.7

1.1

 < 0.001 c

Flexural rash

0.5

1.0

 < 0.001 c

Rash cleared completely

0.5

0.8

 < 0.001 c

Child awakened by itchy rash in the last 12 months

Not at all

0.4

0.5

 < Once/week

0.2

0.4

 > Once/week

0.0

0.2

Eczema ever

0.7

1.1

 < 0.001 c

  1. a Prevalence estimates were weighted using the bootstrap weights
  2. b χ2 test
  3. c P < 0.05