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Table 3 Age- and sex-adjusted relative risks for myeloma and non-Hodgkin's lymphoma among subjects with allergic conditions.

From: Allergic conditions and risk of hematological malignancies in adults: a cohort study

  Myeloma non-Hodgkin's
Exposure N e N o RR 95% CI N e N o RR 95% CI
Asthma, hay fever or hives 10 58 0.7 (0.4–1.4) 22 83 1.1 (0.7–1.8)
Hay fever 10 62 0.9 (0.5–1.7) 21 87 1.3 (0.8–2.2)
Asthma 0 75   - 0 11   -
Hives 1 67 0.5 (0.1–3.9) 1 10 0.4 (0.0–2.6)
Eczema* 3 67 0.6 (0.2–2.0) 8 87 1.3 (0.6–2.6)
Eczema during childhood 1 69 0.5 (0.1–3.7) 6 89 2.3 (1.0–5.3)
Allergic conditions** 12 55 0.7 (0.4–1.4) 27 69 1.3 (0.8–2.0)
  1. Ne = No. of exposed cases, No = No. of unexposed cases.
  2. * At least one positive answer for eczema during childhood or allergic eczema.
  3. ** At least one positive answer for asthma, hay fever, eczema during childhood or allergic eczema.