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Table 1 The prevalence of asthma in relation to socio-demographic and health characteristics in Saudi adults, 2013

From: Prevalence of asthma in Saudi adults: findings from a national household survey, 2013

Factor Categories Total number (Weighted %) Prevalence pa AOR 95 % CI
Cases (Percent) SE
Sex Male 5224 (50.71) 210 (4.53) 0.42 0.08 Ref -
Female 5437 (49.29) 180 (3.56) 0.38 0.79 0.57–1.08
Education Primary or less 3251 (26.27) 150 (5.23) 0.61 0.03 Ref -
Elementary/high 4755 (51.92) 149 (3.76) 0.40 0.72 0.52–1.01
College or higher 2637 (21.80) 91 (3.40) 0.47 0.59 0.39–0.87
Smoking status Never smoker 8837 (84.06) 315 (3.90) 0.30 0.04 Ref -
Former smoker 453 (3.733) 29 (7.47) 1.75 2.01 1.14–3.55
Current smoker 1347 (12.21) 44 (4.13) 0.80 1.04 0.65–1.66
Secondhand smoking Unexposed 7048 (76.75) 260 (4.16) 0.36 0.84 Ref -
Exposed 2122 (23.25) 93 (4.61) 0.65 NA -
Body mass index (kg/m2) 18.5–24.9 (Normal) 2973 (32.72) 77 (2.81) 0.41 <0.001 Ref -
<18.5 (Underweight) 447 (6.505) 18 (5.88) 1.59 2.00 1.03–3.88
25–29.9 (Overweight) 3431 (29.72) 114 (3.11) 0.41 1.06 0.69–1.63
30 or more (Obese) 3810 (31.05) 179 (5.90) 0.60 1.98 1.33–2.95
Type 1 diabetes No 10,422 (98.87) 62 (6.66) 1.09 0.002 Ref -
Yes 150 (1.129) 328 (3.85) 0.29 0.35 0.08–1.49
Blood pressure Normal 4767 (49.58) 161 (3.79) 0.40 0.04 Ref -
Pre-hypertension 3663 (31.54) 126 (3.66) 0.45 0.87 0.61–1.24
Stage I hypertension 1196 (8.933) 65 (6.52) 1.18 1.37 0.85–2.23
Stage II hypertension 1035 (9.951) 38 (4.43) 0.94 1.23 0.72–2.09
  1. Age was removed during the backward elimination (p > 0.5)
  2. SE standard error, AOR adjusted odds ratio, NA not applicable because the subgroup was removed from the model during the backward elimination, Ref reference group
  3. ap for chi2 unadjusted tests