Diabetes, insulin use, and non-Hodgkin lymphoma mortality in Taiwan

Chin-Hsiao Tseng
Metabolism: Clinical and Experimental 2012, 61 (7): 1003-9
The objective was to evaluate non-Hodgkin lymphoma (NHL) mortality trends and mortality rate ratios between diabetes patients and the general population, and to study NHL risk factors among diabetes patients in Taiwan. A cohort of 80 397 patients with type 2 diabetes mellitus older than 45 years was recruited in 1995-1998 and followed up until 2006. Age-standardized NHL mortality in 1995-2006 was calculated. Non-Hodgkin lymphoma risk factors in diabetes patients were evaluated using Cox regression. Age-standardized NHL mortality trend was steady. Eighty-two male and 69 female diabetes patients died of NHL (crude mortality rates, 35.1 and 23.0 per 100 000 person-years, respectively; corresponding overall mortality rate ratios comparing diabetes patients to the general population, 2.06 and 2.14). The mortality rate ratios were 1.47, 2.33, and 2.78 for men aged at least 65, 55 to 64, and 45 to 54 years, respectively; the corresponding ratios for women were 1.48, 2.22, and 2.79. Age and male sex were significant risk factors, whereas insulin use, diabetes duration, smoking, body mass index, and area of residence were not. Diabetes duration became a significant factor after excluding patients who died of NHL within 5 years of diabetes diagnosis. Patients with diabetes have a higher risk of mortality from NHL, but insulin use is not associated with NHL mortality. Future studies are needed to fully elucidate any association between increased mortality rate ratio and younger age as well as the lack of association between NHL and insulin use demonstrated herein.

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