Table 3.

Summary of LC/MS values in reported smokers versus reported nonsmokers

Self-reported smoking statusLC/MS, ng/mL
Reported nonsmokers (n = 84)Mean*29.3
SD*149.6
Minimum ReadingBLQ (≤1)
Maximum Reading1051.1
Reported smokers/users (n = 77)Mean*1851.9
SD*1537.8
Minimum Reading8.8
Maximum ReadingULOQ (>8000)
Total subjects (N = 161)
  • Abbrevations: ULOQ, upper limit of quantitation; BLQ, below limit of quantitation.

  • * Reported below limit of quantitations treated as a reading of 1 ng/mL.