Characteristics of a nested cohort of 133 referred migrants who developed tuberculosis (TB) and for whom clinical notes were reviewed
| Nested cohort | Time between referral for follow-up and TB diagnosis years | |
| Total cohort | 133 | 1.15 (0.36) |
| Reason for referral | 133 | |
| Chest radiograph abnormality | 93 (70) | 0.87 (0.36) |
| History of (treated or untreated) TB | 20 (15) | 1.13 (0.47) |
| Other reasons | 20 (15) | 2.26 (0.75) |
| Diagnosed via follow-up procedures | 84 | 0.73 (0.34) |
| Diagnosed at first follow-up appointment | 34 (40) | 0.58 (0.30) |
| Diagnosed at a subsequent follow-up appointment | 50 (60) | 0.80 (0.46) |
| Passive TB case detection | 49 | 1.81 (0.80) |
| Passive TB case detection during active follow-up period | 6 (12) | 3.06 (1.44) |
| Attended follow-up at least once, but was lost to follow-up and diagnosed passively | 6 (12) | 1.45 (1.22) |
| Diagnosis occurred after discharge from follow-up by the reviewing physician | 12 (24) | 2.59 (1.56) |
| Did not present for follow-up | 25 (51) | 1.62 (0.23) |
| Presented for follow-up at least once | 108 | 1.07 (0.43) |
| Diagnosed via follow-up | 84 (78) | 0.73 (0.33) |
| Passive TB case detection during active follow-up period | 6 (6) | 3.06 (1.44) |
| Attended follow-up at least once, but was lost to follow-up and diagnosed passively | 6 (6) | 1.45 (1.22) |
| Diagnosis occurred after discharge from follow-up by the reviewing physician | 12 (11) | 2.59 (1.56) |
Data are presented as n (%) or median (interquartile range).