Tuberculosis examination using whole blood interferon-gamma release assay among health care workers in a Japanese hospital without tuberculosis-specific wards

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Table 1 Characteristics of HCWs and Quantiferon TB-Gold in tube positivity rate

Total (number)		165
Gender	male	60 (36.4%)
Gender	female	105 (63.4%)
Age (years, (IQR))		38^a (32 - 46)
Job category	nurse	72 (43.6%)
	doctor	53 (32.1%)
	laboratory*	12 (7.27%)
	pharmacist	12 (7.27%)
	other**	16 (9.70%)
Length of working in health care industries (years, (IQR))		13^a (7 - 18)
History of contact investigation for TB		25 (15.2%)
History of living with families who developed active TB		7 (4.24%)
History of working in TB ward/OPD		14 (8.48%)
QFT-GIT positivity (%)	Cut off: 0.35 IU/mL	18 (10.9%)
QFT-GIT positivity (%)	Cut off: 0.10 IU/mL	38 (23.0%)

Note. IQR, interquartile range; TB, tuberculosis; OPD, outpatient department; QFT-GIT, Quantiferon TB-Gold in tube; * Laboratory technician ** radiography technicians, nutritionist, clerical, nursing assistants and social workers; ^amedian.