Table 3 Frequency, unadjusted odds ratios (OR) and 95Â % confidence intervals (CI) for covariates associated with positive results by TST, QFT-GIT, either TST or QFT-GIT and both TST and QFT-GIT
From: Detection of latent tuberculosis infection among migrant farmworkers along the US-Mexico border
|  | TST ≥ 10 mm | QFT-GIT positive | TST ≥ 10 mm or QFT-GIT positive | TST ≥ 10 mm and QFT-GIT positive |
|---|---|---|---|---|
(N = 71) | (N = 106) | (N = 108) | (N = 68) | |
 Demographic Characteristics: | ||||
  Gender | ||||
   Male | Reference | Reference | Reference | Reference |
   Female | 0.99(0.76–1.28) | 0.97(0.77–1.22) | 0.98(0.78–1.23) | 1.00(0.78–1.26) |
  Age | ||||
   18–34 years | Reference | Reference | Reference | Reference |
   35–49 years | 1.11(0.82–1.65) | 0.77(0.59–1.00) | 0.91(0.69–1.19) | 0.92(0.69–1.22) |
   50–64 years | 1.06(0.78–1.44) | 1.04(0.82–1.31) | 1.03(0.81–1.31) | 1.05(0.80–1.39) |
   65–75 years | 1.13(0.78–1.65) | 1.10(0.80–1.52) | 1.15(0.83–1.60) | 1.10(0.78–1.57) |
  Education | ||||
   None or some primary | Reference | Reference | Reference | Reference |
   Completed primary | 1.18(0.82–1.68) | 1.02(0.74–1.41) | 1.05(0.77–1.45) | 1.14(0.82–1.69) |
   Some secondary | 1.09(0.79–1.50) | 1.02(0.76–1.37) | 1.07(0.80–1.44) | 1.02(0.75–1.38) |
   Completed high school or above | 1.12(0.75–1.67) | 1.12(0.80–1.58) | 1.12(0.80–1.58) | 1.13(0.77–1.63) |
  Employment | ||||
   Full time (≥30) | Reference | Reference | Reference | Reference |
   Part time (<30) | 1.19(0.90–1.58) | 0.98(0.76–1.26) | 1.11(0.86–1.44) | 1.00(0.78–1.29) |
   Unemployed/Not working | 1.07(0.80–1.43) | 1.19(0.90–1.58) | 1.11(0.84–1.48) | 1.30(0.98–1.72) |
  Health insurance | ||||
   Yes | Reference | Reference | Reference | Reference |
   No | 1.12(0.87–1.45) | 1.06(0.85–1.32) | 1.14(0.91–1.42) | 1.03(0.81–1.30) |
  Years of farmwork | ||||
    < 10 year. | Reference | Reference | Reference | Reference |
   10–25 years. | 1.02(0.77–1.35) | 0.87(0.68–1.12) | 0.89(0.69–1.14) | 0.99(0.76–1.29) |
    > 25 years. | 1.11(0.84–1.46) | 1.12(0.88–1.44) | 1.13(0.89–1.45) | 1.09(0.84–1.42) |
  No. total persons per household | ||||
   1–3 | Reference | Reference | Reference | Reference |
    ≥ 4 | 0.88(0.70–1.10) | 1.06(0.87–1.30) | 1.02(0.83–1.25) | 0.92(0.75–1.13) |
  No. person sleep in same room | ||||
   1 | Reference | Reference | Reference | Reference |
   2 | 0.88(0.68–1.08) | 0.83(0.65–1.04) | 0.89(0.70–1.13) | 0.79(0.63–1.00) |
    ≥ 3 | 0.79(0.57–1.08) | 0.99(0.75–1.29) | 0.92(0.70–1.22) | 0.86(0.64–1.15) |
 Risk Factors: | ||||
  Excess alcohol use | ||||
   No | Reference | Reference | Reference | Reference |
   Yes | 1.06(0.83–1.35) | 0.88(0.71–1.10) | 0.88(0.71–1.10) | 1.02(0.82–1.27) |
  Current or former smoker | ||||
   No | Reference | Reference | Reference | Reference |
   Yes | 1.35(1.05–1.74)* | 1.06(0.84–1.33) | 1.26(1.01–1.58)* | 1.02(0.80–1.30) |
  Current or former injection drug use | ||||
   No | Reference | Reference | Reference | Reference |
   Yes | 1.59(1.03–2.46)* | 1.42(0.99–2.03) | 1.28(0.89–1.84) | 1.82(1.26–2.64)* |
  Diabetes/High blood sugar | ||||
   No | Reference | Reference | Reference | Reference |
   Yes | 0.69(0.49–0.97)* | 0.78(0.56–1.08) | 0.70(0.51–0.98)* | 0.78(0.57–1.06) |