Table 2.

Median and interquartile range of total NNAL, free NNAL, and NNAL glucuronidation ratio, stratified by race/ethnicity

NMedianInterquartile rangeP when compared with whites
Total NNAL (pmol/mL)
 African Americans3571.801.01–2.88<0.001
 Native Hawaiians3251.080.664–1.680.016
 Whites4341.190.725–2.17
 Latinos4421.220.701–2.120.99
 Japanese Americans6940.9140.532–1.46<0.001
P<0.001
Free NNAL (pmol/mL)
 African Americans3450.4410.268–0.698<0.001
 Native Hawaiians3150.3230.208–0.5090.53
 Whites4190.3470.208–0.551
 Latinos4210.3710.216–0.5960.28
 Japanese Americans6720.3040.188–0.4530.0031
P<0.001
NNAL glucuronidation ratio ((total NNAL − free NNAL)/free NNAL)
 African Americans3452.822.03–4.060.014
 Native Hawaiians3152.171.65–2.84<0.001
 Whites4192.581.99–3.50
 Latinos4212.451.78–3.360.048
 Japanese Americans6722.021.51–2.77<0.001
P<0.001

NOTE: P value using the Wilcoxon–Mann–Whitney test.