Table 2.

Median urine NNAL values by smoking status and gender, ethnicity, and age

Active smokers (urine cotinine >30 ng/mL)Nonsmokers
nMedian (IQR)PnMedian (IQR)P
A. All5580.9 (42.6–151.3)4101.2 (0.5–3.2)
Gender
 Male2084.3 (59.6 -99.8)1631.1 (0.4–2.9)
 Female3562.0 (38.4–183.9)0.82471.2 (0.5–3.4)0.5
Ethnicity
 Asian0510.9 (0.3–3.0)
 Latino829.3 (5.0–57.0)2350.9 (0.4–2.1)
 Black3282.7 (45.4–146.1)703.3 (1.4–10.9)
 White5140.7 (80.8–145.1)101.9 (0.5–4.9)
 Mixed/Other10128.3 (50.0–192.6)<0.01441.4 (0.6–3.9)<0.01
Age
 13–14589.2 (85.4–183.9)950.9 (0.4–2.3)
 15–162162.0 (42.6–82.3)1811.3 (0.5–3.0)
 17–1929105.3 (45.4–208.5)0.141341.2 (0.5–4.1)0.2
B. All5443.6 (23.7–74.1)3841.0 (0.5–2.4)
Gender
 Male2045.4 (39.2–54.5)1520.8 (0.5–2.0)
 Female3440.3 (22.3–83.9)12321.0 (0.5–3.1)0.13
Ethnicity
 Asian0-470.8 (0.4–3.4)
 Latino714.2 (8.4–47.1)2170.7 (0.4–1.5)
 Black3241.3 (27.4–71.6)692.3 (1.0–7.9)
 White555.4 (51.9–92.0)81.9 (0.7–2.7)
 Mixed/other1056.4 (39.8–83.9)0.02431.1 (0.5–3.9)<0.01
Age
 13—14543.7 (43.5–74.1)870.8 (0.5–2.1)
 15—162040.3 (23.9–61.4)1711.0 (0.5–2.4)
 17—192951.9 (23.7–77.0)0.71261.0 (0.4–3.2)0.9
  • A, Volume-based NNAL (pg/mL); B, creatinine-adjusted NNAL (pg/mg creatinine).