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Table 1 Sample distribution of respiratory symptoms and related risk factors in the Limache Cohort in 2001 and 2011

From: Changes in symptoms of asthma and rhinitis by sensitization status over ten years in a cohort of young Chilean adults

Variables Survey year 2001
N = 1,193
Survey year 2011
N = 772
Males Females Male Female
N = 544 (45.6 %) N = 649 (54.4 %) N = 282 (36.5 %) N = 490 (63.5 %)
Age (years) mean (SD) 24.9 (1.6) 24.7 (1.6) 35.4 (2.2) 35.1 (2.0)
Smoking status (%) Never 129 (23.7) 253 (39.0) 73 (21.8) 176 (35.8)
Ex-smokers 48 (8.8) 77 (11.9) 22 (26.1) 107 (21.8)
Current 367 (67.5) 319 (49.1) 148 (52.1) 208 (42.4)
Weight (kg) Median (IQR) 70.1 (63.0–77.9) 61.5 (54.9–70.0) 77.9 (69.5–86.5) 69.1 (61.4–78.3)
Adult height (cm) Mean (SD) 168.1 (6.1) 156.4 (5.5) 168.6 (4.9) 156.9 (6.2)
BMI (kg/m2) Median (IQR) 24.7 (22.6–27.2) 25.1 (22.6–28.6) 27.3 (24.6–30.1) 28.2 (25.4–31.6)
Wheeze in the last 12 months 26.3 28.4 22.7 23.1
Ever had asthma (%) 3.1 5.9 3.9 7.1
Dr diagnosed asthma (%) 2.6 5.4 3.9 7.1
Woken by shortness of breath in the last 12 months (%) 10.7 16.5 14.2 18.0
Nasal allergies including rhinitis in the last 12 months (%) 10.5 22.0 18.4 30.8
At least 1 asthma symptom and nasal allergies (n, %)a 36 (63 %) 82 (58 %) 27 (52 %) 79 (53 %)
Positive skin prick test (SPT) to at least one allergen (data obtained in 2001) (%) 26.7 26.4 28.7 26.9
Positive response to methacholine (data obtained in 2001) (%) 7.9 16.0 7.5 16.9
Educational level achieved     
Primary 126 (23.1) 120 (18.5) 69 (24.5) 106 (21.6)
Secondary 290 (53.3) 348 (53.6) 159 (56.4) 269 (54.9)
Higher 128 (23.5) 181 (27.9) 54 (19.2) 115 (23.5)
  1. aProportion from the total of people reporting having nasal allergies including rhinitis in each group