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Positive patch-testing and doubtful reactions to propolis from 4 different origins among 722 patients
| Origin | Positive n (%) | 95% CI | Doubtful n (%) | 95% CI |
|---|---|---|---|---|
| China | 26 (3.6) | 2.4–5.2 | 18 (2.5) | 1.5–3.9 |
| North America | 23 (3.2) | 2.1–4.7 | 12 (1.7) | 0.9–2.8 |
| Sweden | 16 (2.2) | 1.3–3.5 | 7 (1.0) | 0.4–1.9 |
| Lithuania | 22 (3.0) | 2.0–4.5 | 7 (1.0) | 0.4–1.9 |
CI: confidence interval.
