Table 3

Demographic variables as predictors of a positive test result

T-SPOT.TBQFT-GITTST
VariableOR (95% CI)p ValueOR (95% CI)p ValueOR (95% CI)p Value
Age: 5–7 years vs <5 years1.9 (0.4 to 9.0)NS1.6 (0.5 to 5.6)NS1.1 (0.4 to 3.0)NS
 8–11 years vs <5 years5.1 (1.4 to 18.8)0.013.5 (1.2 to 10.1)0.021.6 (0.7 to 3.7)NS
 12–16 years vs <5 years10.2 (2.9 to 36.8)<0.0015.7 (2.0 to 16.2)0.0013.0 (1.3 to 6.7)0.008
Household TB contact: definite/suspected vs none2.5 (0.9 to 6.5)NS*2.4 (1.0 to 5.8)NS*4 (1.7 to 9.5)0.001
BCG vaccination: scar/history vs none1.8 (0.8,4.0)NS1.7 (0.8,3.6)NS1.7 (0.8 to 3.5)NS*
Cough: presence vs absence4.8 (0.9 to 26.6)NS*1.9 (0.2,17.1)NS4.7 (0.3,80.8)NS
Region of origin: African vs Asian1.1 (0.5 to 2.5)NS1.2 (0.6 to 2.7)NS0.8 (0.4 to 1.6)NS
  • univariate logistic regression used for all analyses. NS p value >0.05; NS* 0.05 <p value≤0.1.

  • TB, tuberculosis; TST, tuberculin skin test.