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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2018 Mar 6;27(5):601–609. doi: 10.1158/1055-9965.EPI-17-0869

Table 2.

Discount vs. Premium Brand Cigarette Smokers Demographics

Discount (n=141) Premium (n=437) Difference p-value

Gender 0.99
Male 81 (52.2 ± 3.6 [44.6, 59.9]) 256 (52.2 ± 4.8 [42.0, 62.3])
Female 60 (47.8 ± 3.6 [40.1, 55.4]) 181 (47.8 ± 4.8 [37.7, 58.0])

Race/Ethnicity <0.001
Mexican American/Hispanic 5 (2.4 ± 1.1 [0.1, 4.7]) 72 (13.4 ± 3.2 [6.6, 20.2])
Non-Hispanic White 102 (81.8 ± 4.4 [72.6, 91.0]) 178 (67.9 ± 5.6 [56.0, 79.8])
Non-Hispanic Black 25 (5.9 ± 2.5 [0.7, 11.2]) 144 (13.0 ± 2.6 [7.5, 18.5])
Other Race - Including Multi-Racial 9 (9.9 ± 4.2 [1.1, 18.6]) 43 (5.7 ± 2.0 [1.6, 9.9])

Education 0.53
Less Than HS 43 (25.6 ± 5.1 [14.8, 36.3]) 113 (21.2 ± 2.6 [15.8, 26.7])
HS or Higher 98 (74.4 ± 5.1 [63.7, 85.2]) 324 (78.8 ± 2.6 [73.3, 84.2])

Cigarette Rod Length 0.003
Regular/King (68-72 mm, 79-88 mm) 63 (44.3 ± 6.0 [31.7, 57.0]) 263 (65.0 ± 4.4 [55.8, 74.2])
Long/Ultra Long (94-101 mm, 110-121 mm) 78 (55.7 ± 6.0 [43.0, 68.3]) 174 (35.0 ± 4.4 [25.8, 44.2])

Cigarette Flavor 0.10
Menthol 29 (20.3 ± 3.7 [12.4, 28.1]) 181 (30.5 ± 3.0 [24.1, 36.9])
Non-Menthol 112 (79.7 ± 3.7 [71.9, 87.6]) 256 (69.5 ± 3.0 [63.1, 75.9])

Cigarette Type 0.55
Filtered 138 (98.8 ± 0.9 [96.8, 100.0]) 429 (97.8 ± 1.3 [95.1, 100.0])
Non-Filtered 3 (1.2 ± 0.9 [0.0, 3.2]) 8 (2.2 ± 1.3 [0.0, 4.9])

When Last Smoked 0.04
Today 129 (93.1 ± 2.3 [88.2, 97.9]) 371 (81.8 ± 3.5 [74.4, 89.2])
Within the last 5 days (not including today) 12 (6.9 ± 2.3 [2.1, 11.8]) 66 (18.2 ± 3.5 [10.8, 25.6])

Number of Days Smoked in the Last 5 Days
All 5 Days 129 (92.3 ± 2.6 [86.9, 97.8]) 383 (83.2 ± 2.8 [77.3, 89.0]) 0.09
1-4 Days 12 (7.7 ± 2.6 [2.2, 13.1]) 54 (16.8 ± 2.8 [11.0, 22.7])

Standing Height (cm) 170.4 ± 0.8 (168.8, 172.0) 170.3 ± 0.7 (168.8, 171.8) 0.1 ± 1.0 (-2.0, 2.2) 0.91

Weight (kg) 79.5 ± 2.3 (74.7, 84.3) 80.4 ± 1.5 (77.2, 83.6) −0.9 ± 3.1 (−7.4, 5.6) 0.77

Age (in Years) at Screening 53.3 ± 1.6 (49.9, 56.7) 43.0 ± 0.5 (41.9, 44.0) 10.4 ± 1.5 (7.3, 13.4) <0.001

Ratio of Family Income to Poverty 2.3 ± 0.3 (1.7, 2.9) 2.3 ± 0.1 (2.0, 2.6) 0.0 ± 0.3 (-0.6, 0.6) 0.97

Serum Cotinine (ng/mL) 264.0 ± 8.1 (246.9, 281.1) 215.9 ± 9.2 (196.5, 235.3) 48.1 ± 11.7 (23.4, 72.8) <0.001

CPD in Last 5 Days 17.5 ± 0.9 (15.6, 19.3) 11.7 ± 0.7 (10.2, 13.2) 5.8 ± 1.2 (3.2, 8.3) <0.001

Categorical Variables: Unweighted Frequencies (Weighted Column % ± Standard Error, [95% CI]), Rao-Scott Chi-Square Adj. F p-value

Continuous Variables: Weighted Mean ± Standard Error (95% CI), Difference Cigarette Smoker – Non-Tobacco User in Least Squared Means (95% CI); Wald p-value

CI = Confidence Interval