Skip to main content

Table 3 Unconditional logistic regression analysis of child, parental, domestic and environmental characteristics associated with S. aureus colonisation in Cape Town participants

From: Molecular epidemiology of Staphylococcus aureus in African children from rural and urban communities with atopic dermatitis

Explanatory variable Colonised a, n (%) Not colonised, n (%) OR [95% CI] p-value
AD: case 30 (41) 13 (18) 4.2 [1.57–11.2] 0.004
Sex: male 19 (26) 19 (25) 0.74 [0.33–1.67] 0.469
Child characteristics
 Breastfeeding 6 (8) 3 (4) 1.71 [0.39–7.45] 0.472
Atopic dermatitis
 Allergic rhinitis 1 (1) 0 (0) Omitted d  
 Asthma § 1 (1) 0 (0) Omitted d  
 Food allergy 6 (8) 3 (4) 1.71 [0.39–7.45] 0.472
Mode of delivery: vaginal 22 (31) 17 (24) 0.95 [0.37–2.43] 0.921
Incomplete immunisation status 8 (11) 2 (3) 3.76 [0.74–19.09] 0.11
Antibiotic exposure 31 (42) 23 (31) 1.35 [0.48–3.77] 0.57
Large family size b 9 (12) 8 (11) 0.88 [0.3–2.61] 0.816
Animal exposure c 1 (1) 1 (1) 0.86 [0.05–14.3] 0.915
Fossil fuel exposure
 Electricity + gas 36 (54) 30 (45) Omitted d  
 Kerosene + paraffin 20 (30) 23 (34) 0.43 [0.15–1.23] 0.116
 Indoor fire 0 (0) 0 (0) Omitted d  
 Outdoor fire 0 (0) 0 (0) Omitted d  
 Wood + coal 0 (0) 0 (0) Omitted d  
Maternal factors
 Allergic rhinitis 0 (0) 5 (7) Omitted d  
 Asthma 3 (4) 3 (4) 0.76 [0.14–4.06] 0.751
 Atopic dermatitis 1 (1) 2 (3) 0.38 [0.03–4.33] 0.432
 Food allergy 1/73 0 (0) Omitted d  
 Smoking 3 (4) 1 (1) 2.65 [0.26–26.82] 0.41
 Pregnant smoker 2 (3) 1 (1) 1.76 [0.15–20.45] 0.65
 Animal exposure c 3 (5) 1 (2) 2.64 [0.26–26.76] 0.412
Paternal factors
 Allergic rhinitis § 5 (7) 2 (3) 2.08 [0.38–11.52] 0.4
 Asthma § 0 (0) 0 (0) Omitted d  
 Atopic dermatitis § 2 (3) 0 (0) Omitted d  
 Food allergy § 1 (1) 0 (0) Omitted d  
 Smoking 13 (20) 7 (11) 1.86 [0.62–5.54] 0.267
  1. AD atopic dermatitis, OR odds ratio, CI confidence interval; § No within group variance; a Colonisation with Staphylococcus aureus. b Large family size is arbitrarily defined by more than 6 members within a household; c Animal exposure refers to exposure to farm animals; d Independent variables omitted due to dependency in the regression model