Table 3.

Urinary PGE-M levels by tobacco smoke exposure (pack-years) among cases and controls combined

Pack-year exposureParticipants (N = 83)Urinary PGE-M (ng/mg creatinine), median (range)
Never349.9 (1.5-27.5)
<202014.2 (2.4-28.3)
21-401315.4 (4.9-52.6)
>401620.3 (5.9-69.7)