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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
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