Factors associated with NC1 among healthcare students from Salvador, Bahia, Brazil, 2004–2008
| Crude OR (CI 95%) | Adjusted OR (CI 95%) | OR difference (%) | p Value† | |
| Model 1: income ≤5 MW* | ||||
| Being a medical student | 0.60 (0.25 to 1.34) | 0.39 (0.11 to 1.08) | −35.0 | 0.0989 |
| Reported BCG vaccination | 0.50 (0.09 to 3.69) | 0.52 (0.09 to 3.88) | −4.0 | 0.4598 |
| Model 2: income >5 MW | ||||
| Being a medical student | 1.70 (1.23 to 2.38) | 1.64 (1.14 to 2.40) | −3.5 | 0.00913 |
| Reported BCG vaccination | 0.27 (0.12 to 0.58) | 0.28 (0.12 to 0.62) | 3.5 | 0.00179 |
| Age above the median | 1.57 (1.15 to 2.13) | 1.52 (1.07 to 2.16) | −3.3 | 0.01796 |
| Model 3: income ≤5 MW | ||||
| Being a physiotherapy student | 1.06 (0.23 to 3.64) | 1.16 (0.17 to 5.10) | 9.0 | 0.856 |
| Reported BCG vaccination | 0.50 (0.09 to 3.69) | 0.49 (0.09 to 3.67) | −2.0 | 0.425 |
| Model 4: income >5 MW | ||||
| Being a physiotherapy student | 0.35 (0.18 to 0.62) | 0.41 (0.20 to 0.79) | 17.1 | 0.01249 |
| Reported BCG vaccination | 0.27 (0.12 to 0.58) | 0.28 (0.12 to 0.63) | 3.5 | 0.00187 |
| Age above the median | 1.57 (1.15 to 2.13) | 1.40 (0.99 to 1.99) | −10.8 | 0.05751 |
* MW, minimum wage (>5 corresponds to the top half of the economic classification system adopted by Brazilian government agencies17).
† Significance of association between each variable and NC1 (failure to attend the first or second tuberculin skin test application) in the multivariate multiple regression model.