Table 1

Prevalence of the studied variables according to gender
Variables Total (N = 1922) Male (N = 942) Female (N = 980) p
n (%) n (%) n (%)
Asthma - confirmed by BHR* < 0.001
No 1722 (89.6) 875 (92.9) 847 (86.4)
Yes 200 (10.4) 67 (7.1) 133 (13.6)
Asthma - previous diagnosis** 0.563
No 1638 (85.2) 798 (84.7) 840 (85.7)
Yes 284 (14.8) 144 (15.3) 140 (14.3)
BMI (kg/m2)# < 0.001
< 25.0 1224 (63.8) 532 (56.5) 692 (70.8)
25.0 - 29.9 464 (24.2) 287 (30.5) 177 (18.1)
≥ 30.0 231 (12.0) 122 (13.0) 109 (11.1)
WC < 0.001
Normal 1300 (67.7) 600 (63.7) 700 (71.5)
Abnormal 621 (32.3) 342 (36.3) 279 (28.5)
WHR§ < 0.001
Normal (< 0.50) 1268 (66.0) 547 (58.0) 721 (73.7)
Abnormal (≥ 0.50) 652 (34.0) 395 (42.0) 257 (26.3)
Physical Activity < 0.001
Active 1113 (57.9) 669 (71.0) 444 (45.3)
Inactive 809 (42.1) 273 (29.0) 536 (54.7)
Smoking habit < 0.001
Non-smokers 1588 (82.6) 747 (79.3) 841 (85.8)
Smokers 334 (17.4) 195 (20.7) 139 (14.2)
Schooling (years) 0.060
< 8 282 (14.7) 146 (15.5) 136 (13.9)
8-11 978 (50.9) 496 (52.6) 482 (49.1)
≥ 12 662 (34.4) 300 (31.9) 362 (37.0)

n: number in that category.

BHR: bronchial hyperresponsiveness.

BMI: body mass index.

WC: waist circumference.

WHR: waist-to-height ratio.

* asthma defined by methacholine PC20 ≤ 4 mg/mL (BHR) and symptoms.

** asthma defined by self-report of a previous physician diagnosis.

# two female subjects and one male subject did not have information about BMI.

§ two female subjects did not have information about the waist-to-height ratio.

Cetlin et al.

Cetlin et al. BMC Public Health 2012 12:844   doi:10.1186/1471-2458-12-844

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