Table 1.
Overall and stratified prevalence of positive sIgE to any allergen in the study population (n = 2778).
| Prevalence of sIgE positivity, % (95% CI) | ||
|---|---|---|
| Guangdong | Yunnan | |
| aOverall prevalence of positivity | 57.8% (56.0%, 59.6%) | 60.9% (59.1%, 62.7%) |
| Prevalence of sIgE positivity by sensitizing allergens | ||
| 1 | 43.6% (40.1%, 47.0%) | 30.7% (29.6%, 35.9%) |
| 2 | 18.7% (16.0,%, 21.4%) | 22.9% (20.1%, 25.7%) |
| 3 | 11.1% (8.9%, 13.2%) | 16.8% (14.4%, 19.3%) |
| 4 | 16.1% (13.6%, 18.7%) | 16.7% (14.2%, 19.2%) |
| 5 | 5.8% (4.2%, 7.5%) | 6.4% (4.8%, 8.0%) |
| ≥6 | 4.7% (3.2%, 6.2%) | 6.4% (4.8%, 8.0%) |
| Gender | ||
| Male | 63.7% (460.0%, 67.4%)** | 65.5% (61.8%, 69.2%)** |
| Female | 53.4% (49.7%, 57.1%) | 57.5% (54.1%, 61.0%) |
| b Age | ||
| 0–3 years | 67.7% (62.3%, 73.1%) | 56.6% (48.3%, 64.9%) |
| 4–6 years | 67.7% (61.6%, 73.8%) | 62.7% (53.7%, 71.8%) |
| 7–14 years | 75.3% (69.2%, 81.3%) | 62.1% (56.6%, 67.7%) |
| 15–50 years | 47.3% (43.3%, 51.4%) | 63.3% (59.9%, 66.8%) |
| ≥51 years | 33.3% (21.4%, 45.3%) | 50.3% (42.4%, 58.2%) |
Data were presented as proportion and 95% confidence interval (95% CI). aThere was no statistical difference in overall prevalence of sIgE positivity between Guangdong (57.8%, 95% CI: 56.0%, 59.6%) and Yunnan (60.9%, 95% CI: 59.1%, 62.7%) when adjusted for age (X 2 = 3.719, P > 0.05). ** P < 0.001; The prevalence of sIgE positivity was significantly higher in male than in female subjects in either province (Guangdong: P < 0.001; Yunnan: P < 0.05). Allergen sensitization showed significant differences among age groups in both Guangdong (P < 0.001) and Yunnan (P < 0.05), bThe Bonferroni correction was used to correct P values of pairwise comparison among five age groups.