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Table 1 Continuous smoking and socioeconomic variables by job type, Pennsylvania Adult Smoking Study

From: Socioeconomic differences in nicotine exposure and dependence in adult daily smokers

Socioeconomic variables Overall Unemployeda (n = 63) Blue Collar (n = 177) White Collar (n = 86) P-value
Mean SD Mean SD Mean SD Mean SD
Age (years) 37.6 11.50 39.0 12.25 35.8 11.29 40.1 10.81 0.008
Household Income ($) 54,677 38,642 34,362 25,009 54,370 38,916 70,128 39,606 <.001
BMI 28.7 7.10 30.3 8.03 28.5 6.95 27.9 6.56 0.107
Height (inches) 66.8 3.97 65.6 3.62 67.3 4.04 66.8 3.91 0.017
Weight (pounds) 182.8 48.85 185.4 50.91 184.1 49.1 178.4 47.07 0.610
Number in household 3.3 1.50 3.3 1.43 3.4 1.62 3.0 1.26 0.082
 Adults 2.3 0.99 2.4 1.1 2.4 1.03 2.2 0.8 0.427
 Children 1.0 1.09 0.9 0.98 1.1 1.19 0.8 0.93 0.143
Smoking variables
Cigarettes per day 16.6 8.07 18.2 8.56 16.8 7.96 15.0 7.72 0.047
FTND score 4.4 2.31 5.1 2.38 4.4 2.21 3.8 2.34 0.005
3HC (ng/mL) 115.7 86.23 130.5 85.88 112.3 86.02 112.1 86.81 0.337
Cotinine (ng/mL) 292.2 161.96 266.8 139.78 297.7 160.47 299.0 179.07 0.392
Nicotine (ng/mL) 558.3 803.74 839.3 1042.79 534.6 803.88 401.4 504.1 0.004
TSNM (mol/L) 0.3 0.08 0.3 0.07 0.3 0.08 0.3 0.09 0.919
NMR 0.42 0.26 0.6 0.32 0.4 0.24 0.4 0.25 <.001
Cotinine/cigarette 20.6 15.66 17.1 11.91 20.1 12.66 24.3 21.87 0.019
  1. aIncludes adult students, disabled, and retired participants. Abbreviations: 3HC: 3′-hydroxycotinine. TSNM: Total Salivary Nicotine Metabolites. NMR: Nicotine Metabolite Ratio. BMI: Body mass index. FTND: Fagerström Test for Nicotine Dependence