Multivariable analysis* of acute respiratory diseases, asthma, conjunctivitis and dermatitis incidence†, in association with the combined exposure zone
| Exposure groups | Combined‡ RR (95% CI) |
|---|---|
| ARD | |
| Overall | 2.5 (2.3 to 2.7) |
| Males | 2.3 (2.1 to 2.7) |
| Females | 2.6 (2.3 to 2.9) |
| ≤1 year | 2.6 (2.4 to 2.9) |
| >1 to ≤14 years | 2.4 (2.2 to 2.6) |
| >14 to <20 years | 2.6 (2.3 to 3.1) |
| ≤50% ‘no education’ strata§ | 2.3 (2.1 to 2.6) |
| >50% ‘no education’ strata | 2.7 (2.4 to 3.0) |
| ≤50% ‘high education’ strata¶ | 2.6 (2.4 to 2.9) |
| >50% ‘high education’ strata | 23 (2.1 to 2.5) |
| ≤50% ‘employment’ strata | 2.6 (2.4 to 2.9) |
| >50% ‘employment’ strata | 2.3 (2.1 to 2.5) |
| Asthma | |
| Overall | 3.7 (3.1 to 4.5) |
| Males | 3.6 (2.8 to 4.7) |
| Females | 3.8 (2.9 to 5.1) |
| ≤1 year | 3.6 (2.2 to 6.1) |
| >1 to ≤14 years | 4.6 (3.8 to 5.7) |
| >14 to <20 years | 2.6 (1.9 to 3.5) |
| Conjunctivitis | |
| Overall | 3.1 (2.9 to 3.5) |
| Males | 2.9 (2.5 to 3.3) |
| Females | 3.5 (3.1 to 4.1) |
| ≤1 year | 3.3 (2.8 to 3.8) |
| >1 to ≤14 years | 3.0 (2.7 to 3.4) |
| >14 to <20 years | 3.8 (3.0 to 4.8) |
| Dermatitis | |
| Overall | 2.7 (2.5 to 3.0) |
| Males | 2.6 (2.3 to 3.0) |
| Females | 2.9 (2.6 to 3.3) |
| ≤1 year | 2.8 (2.5 to 3.3) |
| >1 to ≤14 years | 3.0 (2.7 to 3.3) |
| >14 to <20 years | 2.5 (2.0 to 3.1) |
Study population of ages <20 years, Sohar and Liwa provinces, Oman, 2006–2010.
*Adjusted for time trend.
†Age and gender standardised according to census population figures for 2010.
‡Including high and intermediate zones, with control zone as the reference.
§Stratification by SES was only carried out for ARD due to insufficient numbers in other disease definitions.
¶High education determines as having a bachelor degree or higher.
ARD, acute respiratory diseases CI, confidence interval; RR, risk ratio; SES, socioeconomic status.