Skip to main content

Table 1 Characteristics of cases and controls. Represented as count and percent of subgroup (N, %) or as median and interquartile range (IQR). P value determined McNemar chi-squared test, or paired samples t test using natural log transformed measures

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

  Cases Controls  
N = 108 N = 216
Characteristic Median or N (%) Min - Max Median or N (%) Min - Max P value
95 % CI (mean) 95 % CI (mean)
Male, N (%) 57 (53 %) 43.4–63.2 109 (51 %) 57.1–43.8 0.634
Age (years) 11.81 6.1–17.9 12.12 6.1–18.3 0.001
11.4–12.2 11.7–12.6
BMI (kg/m2) 24.4 14.6–62.1 21.9 10.8–45.4 0.004
24.3–26.5 22.7–24.4
White Blood Cells (WBC) (X 1000) 7.30 3.3–16.5 6.80 2.7–14.7 0.001
7.2–7.9 6.7–7.1
PMNsa (% of WBC) 54.7 25.7–85.1 56.2 3.6–85.5 0.398
53.4–56.1 54.7–57.5
Lymphocytes (%) 30.9 9.0–65.6 30.8 12.0–54.8 0.797
30.4–32.8 30.2–35.5
Basophils (%) 1.3 0.5–6.3 1.5 0.3–17.0 0.273
1.4–1.6 1.5–1.9
Eosinophils (%) 4.1 0.3–22.3 2.7 0.1–27.2 0.002
4.8–5.6 3.3–4.2
CRP (mg/L) 1.12 0.35–17.2 1.07 0.36–74.4 0.254
2.0–2.8 1.4–3.5
IgEb (total, kU/L) 213 3.0–4473 89 2.0–2676 0.001
382.6–573.9 169.1–271.0
IgE, Alternariac 24 (22 %) 14.4–30.1 11 (5 %) 2.2–8.0 0.001
IgE, cat dander 34 (32 %) 22.7–40.2 17 (8 %) 4.3–11.5 0.001
IgE, cockroach 29 (27 %) 18.5–35.2 28 (13 %) 8.5–17.4 0.001
IgE, dust mite 40 (37 %) 27.9–46.1 39 (18 %) 12.9–23.2 0.001
IgE, dog dander 30 (28 %) 19.3–36.2 13 (6 %) 2.8–9.2 0.001
> one antigen over detection limit 66 (61 %) 51.9–70.3 61 (28 %) 22.2–34.2 0.001
History of hay fever or seasonal allergy 38 (36 %) 26.2–44.2 65 (32 %) 24.0–36.2 0.444
  1. apolymorphonuclear leukocytes
  2. btotal Immunoglobulin E
  3. cantigen specific IgE (ie above minimum detection limit, <0.35 kUA/L)