Univariate | Multivariate | ||||
OR | 95% CI | p-value | OR | 95% CI | |
Analysis 2a – Potential sources with smear-positive disease only, newly diagnosed infection | |||||
Age at infection | 1.01 | 0.97–1.05 | 0.603 | Not in final model | |
Male sex | 1.23 | 0.54–2.81 | 0.623 | Not in final model | |
Current smoking | 1.26 | 0.36–4.38 | 0.719 | Not in final model | |
BCG | 0.93 | 0.23–3.71 | 0.922 | Not in final model | |
Residing with a person with smear-positive disease | 1.40 | 0.44–4.43 | 0.572 | Not in final model | |
Total exposures | 1.34 | 1.11–1.60 | 0.002 | 1.44 | 1.18–1.76 |
Persons per room# | 1.24 | 1.09–1.41 | 0.001 | 1.33 | 1.15–1.54 |
Analysis 2b – Potential sources with smear-positive disease only, tuberculin skin test conversion only | |||||
Age at infection | 1.01 | 0.97–1.06 | 0.574 | Not in final model | |
Male sex | 1.00 | 0.40–2.52 | 1.000 | Not in final model | |
Current smoking | 1.42 | 0.36–5.64 | 0.621 | Not in final model | |
BCG | 1.28 | 0.23–6.95 | 0.778 | Not in final model | |
Residing with a person with smear-positive disease | 2.10 | 0.54–8.15 | 0.284 | Not in final model | |
Total exposures | 1.39 | 1.14–1.71 | 0.001 | 1.53 | 1.24–1.88 |
Persons per room# | 1.29 | 1.12–1.48 | 0.001 | 1.40 | 1.18–1.66 |
BCG: Bacillus Calmette–Guérin. #: For comparability to [6], persons per room scaled such that odds ratio corresponds to a one-person increase in a five-person house. Age and persons per room are centred at the overall mean for analysis 1a, at 20.8 years and 1.7 persons per room, respectively. Total exposures centred at 1, as all individuals had at least one contact.