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Table 3 Prevalence of Asthma Symptoms and Other Allergic Conditions According to Age

From: Prevalence of asthma and other allergic conditions in adults in Khuzestan, southwest Iran, 2018

Asthma symptoms and other allergic conditions

Age (years)

20–29

30–44

45–65

P-value¥

Yes

%a (95% CI)

Yes

%a (95% CI)

Yes

%a (95% CI)

Asthma-like symptoms

353

15.8(12.7–18.9)

397

18.0(14.6–21.3)

309

26.8(22.5–31.2)

< 0.001*

Wheezing

247

11.1(8.6-13.5)

273

12.4(9.8–15.0)

208

18.2(14.9–21.6)

< 0.001*

Wheezing with shortness of breath

223

10.1(8.1–12.2)

259

11.9(9.6–14.3)

192

16.9(14.1–19.7)

< 0.001*

Wheezing in the absence of a cold

211

9.7(7.8–11.7)

241

11.2(8.9–13.5)

204

18.0(14.7–21.4)

< 0.001*

Waking with tightness in the chest

218

9.7(7.6–11.8)

269

12.2(9.7–14.6)

203

17.3(14.3–20.3)

< 0.001*

Woken by an attack of breathlessness

191

8.5(6.7–10.3)

211

9.5(7.5–11.5)

178

15.2(12.4–18.0)

< 0.001*

Woken by attack of cough

250

11.1(8.9–13.4)

289

12.9(10.3–15.6)

229

19.5(16.3–22.8)

< 0.001*

Current asthma

162

7.2(5.6–8.9)

185

8.3(6.5–10.1)

131

11.3(9.0–13.7)

< 0.001*

Asthma attack

139

6.2(4.7–7.8)

158

7.0(5.3–8.8)

113

9.7(7.6–11.8)

0.001*

Medications for asthma

139

6.2(4.8–7.6)

158

7.1(5.4–8.7)

120

10.4(8.3–12.4)

< 0.001*

Physician-confirmed asthma

122

5.5(4.1–6.9)

136

6.1(4.7–7.6)

101

8.7(7.0–10.4)

0.005*

Allergic Rhinitis

710

31.6(28.4–34.7)

553

24.7(22.2–27.2)

281

23.9(21.1–26.8)

< 0.001*

Airway hyperresponsiveness

956

42.2(38.1–46.3)

795

35.8(31.7–39.9)

439

37.3(32.7–41.9)

0.001*

Eczema

276

12.3 (10.2–14.4)

209

9.4(7.7–11.0)

120

10.3(8.0–12.6)

0.012*

  1. a: Prevalence estimates were weighted using normalized cross-sectional weights
  2. ¥ χ2 test
  3. *P < 0.05