Risk factors of extra pulmonary tuberculosis in Basrah

Abstract EN

This article aimed to study the risk factors of extra pulmonary tuberculosis (EPT) in Basrah.

A case-control study of 78 known cases of extra pulmonary tuberculosis (EPT) and 156 control subjects studied in “TB and Respiratory Diseases Center” in Basrah from December 2014 to March 2015.

Forty four (56%) of EPT cases were females (P>0.05) and the males were 34 (44%).

Lymph nodes were the commonest site for EPT (33%), followed by tuberculosis pleural effusion and osteal tuberculosis (19% each).

34.6% of EPT patients consume raw milk while only 4.5% of the control group (free from EPT) consume raw milk with an odds ratio of 11.2, P<0.01.

Some 6.4% of EPT patients had family history of having tuberculosis, and the odds ratio is 10 and P<0.01.

The risk of development of EPT in people of less than 120.000 ID monthly incomes is 3.2 times greater than those with higher income, P<0.01.

Regarding Body Mass Index (BMI), when comparing people having normal BMI (18.5-25 Kg/M2) with people having subnormal BMI, the risk of having EPT is 3.9 times in underweight patients, P<0.01.

In conclusion, risk factors for EPT are; consumption of raw milk, family history of TB, BMI<18 (Kg/M2) and a monthly income <120.000 ID.