Table 1.
Demographic and Smoking Characteristics of Randomized Participants
| Overall (N = 245) | Usual nicotine content group (N = 123) | Reduced nicotine content group (N = 122) | |
|---|---|---|---|
| Usual brand baseline | |||
| aAge (years) | 44.9 (11.4) | 45.1 (10.8) | 44.7 (12.1) |
| aGender (male) | 117 (47.8) | 51 (41.5) | 66 (54.1) |
| aRace (n = 243) | |||
| White | 153 (62.4) | 82 (67.2) | 71 (58.7) |
| Black | 78 (31.8) | 35 (28.7) | 43 (35.5) |
| Other | 12 (4.8) | 5 (4.1) | 7 (5.7) |
| aHispanic ethnicity | 6 (2.4) | 2 (1.6) | 4 (3.3) |
| aEducation | |||
| Less than a HS degree | 40 (16.3) | 25 (20.3) | 15 (12.3) |
| HS degree or GED equivalent | 112 (45.7) | 57 (46.3) | 55 (45.1) |
| More than a HS degreeb | 93 (38) | 41 (33.3) | 52 (42.6) |
| aHousehold incomec (n = 184) | |||
| $0–19 999 | 68 (37) | 30 (31.2) | 38 (43.2) |
| $20 000–59 999 | 72 (39.1) | 41 (42.7) | 31 (35.2) |
| $60 000+ | 44 (23.9) | 25 (26) | 19 (21.6) |
| Cigarettes/day | 19.6 (9.3) | 19.8 (10.2) | 19.5 (8.4) |
| Exhaled carbon monoxide | 30 (15) | 30 (15) | 29 (15) |
| Plasma cotinine (ng/mL)d | 274 (151) | 266 (157) | 282 (145) |
| Median (Range) | 253 (3–812) | 237 (3–812) | 261 (24–730) |
Continuous measures reported as mean (standard deviation); Categorical measures reported as frequency (column percent).
HS= high school; GED= general education diploma.
aMeasure incorporated from PhenX Toolkit33 version October 5, 2015.
bLess than a Bachelor's degree required for inclusion.
cTotal Family (Household) Income includes the participant's income + income of all family members living in the participant's household (before taxes for the last calendar year).
dValues < Limit of Quantification (LOQ = 4.3) were coded as 3 (LOQ/sqrt(2)).