| N events | Person years | Rate (per 100 person years) | Hazard ratio 95% confidence interval | p |
---|---|---|---|---|---|
Age (for each year increase) | 9 | NA | NA | HR 1.12; 95% CI 1.03-1.22 | 0.01 |
Age at hire (for each year increase) | 9 | NA | NA | HR 1.008; 95% CI 0.93-1.09 | 0.83 |
Time since hire (for each year increase) | 9 | NA | NA | HR 1.06; 95% CI 0.99-1.13 | 0.08 |
Gender (male vs female) | F 6 | 24.5 | 32.7 | HR 0.29; 95% CI 0.04-2.35 | 0.25 |
M 3 | 10 | 10.3 | |||
Profession (physician vs nurse) | Nurse 7 | 23.8 | 33.64 | HR 0.45; 95% CI 0.09-2.17 | 0.32 |
Physician 2 | 11.8 | 16.9 | |||
Sputum smear of the index case (positive vs negative)* | Negative 6 | 14.7 | 20.5 | HR 1.59; 95% CI 0.04-6.3 | 0.58 |
Positive 3 | 19.6 | 30.7 | |||
History of BCG (positive vs negative) | Negative 3 | 19.7 | 15.3 | HR 2.84; 95% CI 0.71-11.34 | 0.14 |
 | Positive 6 | 14.6 | 41.25 |  |  |