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Table 3 Frequency, unadjusted odds ratios (OR) and 95 % 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)
  1. *P-value < 0.05