Data collection
Data on HCWs diagnosed with TB were collected through
chart review of employee occupational health medical records
at the three study hospitals between July and
September 2011. Cases of TB disease among HCWs
were identified based on new documented diagnosis
during a five-year period between January 1, 2006 and
December 31, 2010. The following data were abstracted
using a standardized chart audit form: age (at time of abstraction),
sex, race, occupation, years working in facility,
wards or departments where a HCW worked, HIV-status
(at time of abstraction), previous TB history, type of TB,
and comorbidities (e.g. diabetes).