A. Severity of DM at the time of TB diagnosis, defined by Boucot et al as mild if requiring no insulin, moderate if requiring <40 U and severe if requiring ≥ 40 U. In Silwer and Oscarsson, mild DM was defined as requiring less than 20 U of insulin, severe DM if requiring ≥ 40 U, had tendency to acidosis, repeated comma attacks and was difficult to regulate, and moderate DM was the category in between mild and severe. B. History of DM prior to TB development. In Silwer and Oscarsson, < 10 yrs with DM refers to 5-9 years.