Table 2.
Comparison of TST results: 1990 and 2005 vs. 2012
| TST Result | Getchell and others, 199213 | Pelly and others, 200511 | Martinez and others, 2013 (Reference) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | Negative(0–4 mm) | Borderline(5–9 mm) | Positive(≥ 10 mm) | P value vs. 2012† | n | Negative(0–4 mm) | Borderline(5–9 mm) | Positive(≥ 10 mm) | P value vs. 2012† | n | Negative(0–4 mm) | Borderline(5–9 mm) | Positive(≥ 10 mm) | ||
| Age group | |||||||||||||||
| 5–14 years | 89 | 56 (62.9) | 13 (14.6) | 20 (22.4) | 0.04* | – | – | – | – | – | 103 | 55 (53.4) | 31 (30.1) | 17 (16.5) | |
| 15–24 years | 58 | 16 (27.6) | 7 (12.1) | 35 (60.4) | < 0.01** | 35 | 23 (65.7) | 0 (0.0) | 12 (34.3) | < 0.01** | 67 | 25 (37.3) | 19 (28.4) | 23 (34.3) | |
| ≥ 25 years | 72 | 16 (22.2) | 7 (9.7) | 49 (68.1) | 0.25 | 68 | 18 (26.5) | 7 (10.3) | 43 (63.2) | 0.08 | 258 | 38 (14.7) | 36 (14.0) | 184 (71.3) | |
| All | 219 | 88 (40.1) | 27 (12.3) | 104 (47.5) | < 0.01** | 103 | 41 (39.8) | 7 (6.8) | 55 (53.4) | < 0.01** | 428 | 118 (25.6) | 86 (20.1) | 224 (52.3) | |
Figures are number of participants per age category (%).
*
P < 0.05.
**
P < 0.01.
†
P values refer to the comparison between the age-specific prevalences of each of the tuberculin skin test (TST) result categories reported by Martinez and others, 2012 (reference) and those reported by Getchell and others, 199213 and Pelly and others, 2005,11 respectively.
TST= tuberculin skin test.
Only two participants did not have Bacille Calmette-Guérin (BCG) scars (0.05%), of whom one had a negative TST (50%) and the other had a positive TST (50%). Because of the small number of observations, we did not further stratify the TST results by number of BCG scars (0 vs. ≥ 1 BCG scar).