Fig. 4

Random-effects meta-analysis of association of lymphoma cancer incidence and allergy. (a). Forest plot is stratified by study design. (b). Forest plot is stratified by different allergy type. (c). Forest plot is stratified by different allergy type, results were adjusted based on sensitivity analysis. (d). Forest plot of the association after excluding low‑quality studies (NOS < 3) to assess robustness of the pooled estimate. If HR, RR, or OR are provided, they were used for the calculations. If these measures were not provided, the OR value was calculated based on the raw data from the original articles. OR, odds ratio; RR: relative risk; HR: hazard ratio; CI, confidence interval.