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. Author manuscript; available in PMC: 2018 Jul 1.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2017 Mar 14;26(7):1034–1042. doi: 10.1158/1055-9965.EPI-16-0838

Table 1.

Summary of study population stratified by race/ethnicity and sex.

Median [Interquartile Range]

African Americans Japanese Americans Whites



All n = 327 n = 349 n = 396
Age (years) 64 [59–69] 63 [59–69] 62 [59–68]
BMI (kg/m2) 26.9 [23.2–30.7] 24.3 [21.9–26.6] 24.8 [22.0–28.1]
Creatinine (mg/dL) 88 [54–138] 54 [33–81] 53 [33–83.2]
Cigarettes per day 10 [5–18] 13 [10–20] 17 [10–20]
Total nicotine equivalents (nmol/mL) 44.2 [26.8–73.8] 26.5 [15.4–41.2] 35.8 [21.9–60.8]
Males n = 94 n = 181 n = 169
Age (years) 63 [58–66] 63 [59–68] 62 [59–67]
BMI (kg/m2) 25.7 [23.0–28.2] 25.0 [23.0–26.9] 25.8 [23.3–27.9]
Creatinine (mg/dL) 124.5 [81.5–165.1] 66 [40–95] 71.0 [46.3–104.0]
Cigarettes per day 10 [6–20] 15 [10–20] 20 [12.5–20]
Total nicotine equivalents (nmol/mL) 54.4 [29.2–95.5] 29.3 [17.9–45.6] 39.9 [24.6–73.0]
Females n = 233 n = 168 n = 227
Age (years) 65 [60–71] 64 [59–70.5] 62 [58–69]
BMI (kg/m2) 27.5 [23.6–31.6] 23.4 [20.6–26.5] 24.0 [21.0–28.3]
Creatinine (mg/dL) 79 [50–126] 44.5 [28.0–63.5] 46 [29–65]
Cigarettes per day 10 [5–15] 10 [7.5–20] 15 [7–20]
Total nicotine equivalents (nmol/mL) 41.3 [26.1–65.3] 22.5 [13.0–35.0] 31.2 [20.2–50.5]