Table 2.
The serum concentrations of C-reactive protein (CRP), club cell protein 16 (CC-16), surfactant protein D (SP-D) and nicotine and cotinine at baseline in 65 drill floor workers and 65 referents. Mean concentrations adjusted for age, current smoking habits and BMI are shown in brackets.
| Biomarkers | Drill Floor Workers | Referents | |||
|---|---|---|---|---|---|
| AM † | Min–Max | AM | Min–Max | p | |
| CRP ‡ (mg/L) | 0.9 (1.0) | 0.1–12 | 1.4 (1.3) | 0.2–16 | 0.02 |
| CC-16 (µg/L) | 4.5 (4.6) | 1.0–9.1 | 4.4 (4.3) | 1.0–12 | 0.62 |
| SPD ‡ (µg/L) | 166 (167) | 70–886 | 176 (174) | 59–448 | 0.45 |
| Current smokers (n) | 20 | - | 15 | - | - |
| S-nicotine (µg/L) | 14.0 | <DL–53 | 20.4 | <DL–54 | 0.18 |
| S-cotinine (µg/L) | 205 | <DL–382 | 236 | 4.3–438 | 0.50 |
| Current snuff-users (n) | 24 | - | 9 | - | - |
| S-nicotine (µg/L) | 14.8 | <DL–54 | 19.2 | <DL–39 | 0.40 |
| S-cotinine (µg/L) | 315 | <DL–1275 | 340 | 123–500 | 0.79 |
† arithmetic mean; ‡ geometric mean.