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Table 2 Logistic regression analysis with adjustment for age due to significant age difference between cases and controls. Odds ratios indicate increased risk associated with a 1 unit change in the natural log of continuous variables

From: Humoral immune factors and asthma among American Indian children: a case–control study

  Odds Ratio P-Value 95 % CI
Age (years) 0.968 0.377 0.90–1.04
Individual variables below, simultaneously adjusted for age
Gender (Female = 0, Male = 1) 1.083 0.736 0.68–1.72
Body Mass Index (kg/m2) 3.720a 0.006 1.46–9.45
CRP (mg/L) 1.143a 0.260 0.91–1.44
IgE (total, kU/L) 1.425a 0.001 1.20–1.69
White blood cell count (X1,000) 3.008a 0.01 1.26–7.20
PMN leukocytes 0.899a 0.836 0.33–2.45
Lymphocytes 0.947a 0.903 0.39–2.27
Eosinophils 1.520a 0.01 1.10–2.09
Basophils 0.753a 0.277 0.45–1.26
Alternaria (quant)b 1.765 a 0.001 1.34–2.32
Alternaria (binary)c 5.280 0.001 2.47–11.27
Cat dander (quant) 1.702a 0.001 1.36–2.14
Cat dander (binary) 5.432 0.001 2.86–10.32
Cockroach (quant) 1.612a 0.001 1.27–2.05
Cockroach (binary) 2.522 0.002 1.41–4.53
Mite (quant) 1.287a 0.02 1.04–1.59
Mite (binary) 2.751 0.001 1.63–4.66
Dog (quant) 2.360a 0.001 1.63–3.42
Dog (binary) 6.135 0.001 3.03–12.41
Cumulative sensitivityd 1.830 0.001 1.49–2.24
  1. aodds ratio associated with the natural log transformed value of this measure
  2. bIgE specific titer, samples below the detection limit of 0.35 were assigned values of 0.35 /√2
  3. cAny level above detection limit vs below detection limit
  4. dNumber of antigens tested that showed specific IgE above detection limit for that individual