Table 1

 Occupational characteristics of healthcare workers included in the cohort analysis (n = 2182), and distribution of tuberculin skin testing conversions (n = 148) and of person-years at risk (n = 8947)

Occupational characteristicsn (%)TST conversions, nPerson-years at risk
TST, tuberculin skin testing.
At least one change of occupation or workplace258 (11.8)10712
Working in hospital setting1532 (70.2)1176061
Occupation (work activity)
    Clerical93 (4.3)3284
    Medical567 (26.0)432200
    Nursing1412 (64.7)995566
    Social110 (5.0)3447
Workplace
    Laboratory149 (6.8)20539
    Administrative112 (5.1)2375
    Outpatient692 (31.7)382661
    Surgery367 (16.8)361538
    Medicine748 (34.3)392938
    Infectious disease114 (5.2)13446
Duration of employment (⩾1 years)2155 (98.8)1100