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Table 1 Comparison of the characteristics of the total cohort, 486, 341 subjects, with those having a past history for TB, 5,036 subjects

From: The reduction of tuberculosis risks by smoking cessation

  Total cohort Self reported
TB history (+)
(%)‡ OR† (95%C.I.)
Age 486,341 5,036 (1.20)   
   20-29 113,361 455 (0.45) 1 -
   30-39 149,192 1,072 (0.81) 1.74* (1.6~1.9)
   40-49 87,217 981 (1.30) 2.77* (2.5~3.1)
   50-59 71,350 958 (1.60) 3.44* (3.1~3.9)
   60-69 47,610 967 (2.54) 5.05* (4.5~5.6)
   70+ 17,611 603 (4.38) 8.39* (7.4~9.5)
Gender 486,341 5,036 (1.20)   
   Women 255079 1918 (0.88) 1 -
   Men 231262 3118 (1.55) 1.79* (1.7~1.9)
Education 399,135 4,969 (1.24)   
   High school or above 291,711 3,364 (1.15) 1 -
   Middle school or below 107,424 1,605 (1.49) 0.48* (0.4~0.5)
Smoking 384,855 4,768 (1.24)   
   Non smokers 270,488 3,148 (1.16) 1 -
   Ex smokers 23,787 561 (2.36) 1.17* (1.1~1.3)
   Current smokers 90,580 1,059 (1.17) 0.77* (0.7~0.8)
Drinking 379,996 4,720 (1.24)   
   Nondrinker 296,235 3,349 (1.13) 1 -
   Ex-drinker 11,599 249 (2.15) 1.16* (1.0~1.3)
   Occasional drinker 56,050 848 (1.51) 1.04 (1.0~1.1)
   Regular drinker 16,112 274 (1.70) 1.15* (1.0~1.3)
Body Mass Index 485,080 5,031 (1.20)   
   <18.5 kg/m2 39,565 575 (1.62) 1.78* (1.6~2.0)
   18.5 -< 23 kg/m2 214,250 2,452 (1.32) 1 -
   23 -< 25 kg/m2 98,734 1,007 (1.19) 0.65* (0.6~0.7)
   25 -< 30 kg/m2 113,897 904 (0.94) 0.47* (0.4~0.5)
   30 kg/m2 18,634 93 (0.59) 0.34* (0.3~0.4)
Diabetes 483,641 5,036 (1.20)   
   No history of diabetes 476,434 4,827 (1.18) 1 -
   Known diabetes or on medications 9,907 209 (2.11) 1.17* (1.0~1.4)
  1. *: p < 0.05
  2. † : OR: the likelihood of having TB history for those with a given variable against those without the given variable, adjusted for age
  3. ‡ The actual number of available subjects was used to arrive at the percentages. Questionnaires were administered as of 1996. Thus, during the start-up period of two years, 1994-1996, data on a proportion of subjects were missing. TB history (14%), education (18%), smoking (21%), and drinking (21%).
  4. BMI and diabetes were more than 99% complete for total cohort.