Table 6.

Covariate-adjusted^* logistic regression models of associations of living in communities in south Durban compared with living in north Durban with child outcomes (N=423)

	South/north			PM10 †			SO2 †
Health outcome	OR	95% CI	p-value	OR	95% CI	p-value	OR	95% CI	p-value
Symptom-defined outcomes
Chronic cough	0.81	0.47 – 1.40	0.45	1.03	0.41 – 2.58	0.96	1.02	0.47 – 2.19	0.97
Chronic phlegm	1.55	0.76 – 3.15	0.23	0.56	0.16 – 1.93	0.36	0.88	0.32 – 2.42	0.80
Chronic bronchitis	3.53	1.30 – 9.55	0.01	1.02	0.21 – 5.01	0.98	1.34	0.34 – 5.22	0.67
Wheezing	1.00	0.63 – 1.57	0.99	1.27	0.75 – 2.15	0.37	1.13	0.73 – 1.74	0.58
Wheezing with SOB	1.12	1.01 – 1.24	0.04	0.98	0.88 – 1.10	0.72	0.86	0.49 – 1.53	0.61
Stuffy, runny nose	1.22	0.80 – 1.87	0.36	0.91	0.58 – 1.43	0.68	0.96	0.66 – 1.40	0.85
Watery, itchy eyes	2.29	1.48 – 3.55	0.00	1.34	0.81 – 2.23	0.25	1.02	0.67 – 1.53	0.94
Persistent asthma	1.14	0.75 – 1.74	0.54	1.09	0.56 – 2.12	0.79	1.37	0.80 – 2.35	0.26
Test-based outcomes
rked AHR	2.49	1.13 – 5.5	0.024	1.08	0.44 – 2.66	0.867	2.14	0.98 – 4.66	0.056

PM₁₀ = particulate matter ≤10 µm in aerodynamic diameter; SO₂ = sulphur dioxide; SOB = shortness of breath; AHR = airway hyperreactivity; OR = odds ratio; CI = confidence interval.

Bold text denotes statistically significant or borderline significance.

^*Covariates included age, male gender, race (Indian, coloured, black African (reference group)), education, smoker in home, household income (<R10 000, R10 000 – R29 999, R30 000 – R74 999, ≥R75 000 (reference group)), glutathione-S-transferase M1 polymorphism (GSTM) genotype negative.

^†Mean school exposure level.