Table 5 Risk ratios for failure to obtain a TST result by demographic and clinical characteristic. Results are presented for complete case analysis (n = 1878 patientsa) and analysis using combined results of 20 imputed datasets (n = 2303 patients). RRs marked with an asterisk (*) are statistically significant. CI = confidence interval
From: The latent tuberculosis infection cascade of care in Iqaluit, Nunavut, 2012–2016
Potential Risk factor | Patients with no TST results/ category total (%) | Risk ratio from univariate modelsb (95% CI) | Adjusted risk ratioc (95% CI), complete case | Adjusted risk ratioc (95% CI), multiple imputation |
|---|---|---|---|---|
Age, years (per 5-year increase) | – | 0.98 (0.95–1.02) | – | – |
Sex | ||||
Male | 69/1065 (6.5%) | Reference | – | – |
Female | 61/1238 (4.9%) | 0.87 (0.67–1.13) | – | – |
Ethnicity | ||||
Inuit | 48/1220 (3.9%) | Reference | Reference | Reference |
Non-Inuit | 28/658 (4.3%) | 0.76 (0.54–1.06) | 0.68 (0.47–0.98)* | 0.79 (0.58–1.06) |
Indication for TST | ||||
Tuberculosis exposure | 20/606 (3.3%) | Reference | Reference | Reference |
Employment screening | 26/506 (5.1%) | 1.22 (0.82–1.83) | 1.08 (0.65–1.78) | 1.16 (0.77–1.76) |
School screening | 25/297 (8.4%) | 1.52 (0.95–2.42) | 1.26 (0.68–2.29) | 1.32 (0.83–2.11) |
Self or physician referral | 45/746 (6.0%) | 1.72 (1.22–2.42)* | 1.65 (1.12–2.44)* | 1.64 (1.17–2.30)* |
Year of TST | ||||
2012 | 28/759 (3.7%) | Reference | Reference | Reference |
2013 | 29/547 (5.3%) | 1.27 (0.88–1.83) | 1.38 (0.88–2.16) | 1.25 (0.87–1.81) |
2014 | 31/498 (6.2%) | 1.18 (0.80–1.74) | 1.08 (0.65–1.79) | 1.16 (0.79–1.71) |
2015 | 36/425 (8.5%) | 1.52 (1.05–2.19)* | 1.19 (0.70–2.02) | 1.52 (1.04–2.22)* |
2016 | 6/74 (8.1%) | 1.76 (0.93–3.34) | 1.98 (0.94–4.15) | 1.71 (0.91–3.21) |