The purpose of this laboratory contract is to measure the level of caffeine and its primary metabolite. paraxanthine, in approximately 6,500 serum samples that have been stored in the Collaborative Perinatal Project serum repository, as well as to measure osmolality in each of these samples and toinine in approximately 565 of these samples.
Klebanoff, Mark A; Zhang, Jun; Zhang, Cuilin et al. (2009) Maternal serum theobromine and the development of preeclampsia. Epidemiology 20:727-32 |
Klebanoff, Mark A; Levine, Richard J; Clemens, John D et al. (2002) Maternal serum caffeine metabolites and small-for-gestational age birth. Am J Epidemiol 155:32-7 |
Klebanoff, M A; Levine, R J; DerSimonian, R et al. (1999) Maternal serum paraxanthine, a caffeine metabolite, and the risk of spontaneous abortion. N Engl J Med 341:1639-44 |
Klebanoff, M A; Levine, R J; Clemens, J D et al. (1998) Serum cotinine concentration and self-reported smoking during pregnancy. Am J Epidemiol 148:259-62 |