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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Predicting Bone Turnover Following Tobacco Exposure Using Bone Alkaline Phosphatase and N-Telopeptide Biomarkers and Possible Variability and Effect Modification of These Markers by Race/Ethnicity

Omoike, Ogbebor E., Wang, Liang, Oke, Adekunle O., Johnson, Kiana R. 03 July 2020 (has links)
Introduction: This study investigated the systemic response of serum bone alkaline phosphatase (SBAP) and urinary N-telopeptide (UNTX) to tobacco exposure and environmental tobacco smoke (ETS) and the possible effect modification (and variability) of this response by racial/ethnic origin. Methods: Data (n=5411) were obtained from the National Health and Nutrition Examination Survey, with data analysis done on adults aged ≥ 20years. Outcome variables were SBAP and UNTX. Independent variable was tobacco exposure measured using serum cotinine levels and adjusted for covariates. Generalized linear models were used to explore associations. Results: A percentage increase in log transformed serum cotinine was associated with a 0.005 percentage increase in log transformed SBAP (CI: 0.002, 0.008) and 0.02 percentage increase in log transformed UNTX (CI: −0.01, 0.04) with interaction between cotinine and race/ethnicity (p=0.01). Stratifying by race/ethnicity, tobacco exposure was associated with significant decreases in UNTX among non-Hispanic Whites–0.008(−0.014, −0.002) and Mexican Americans −0.014 (−0.025, −0.002) only. Categories of serum cotinine were associated with a monotonic increase in SBAP (p for trend <0.001) and monotonic non-linear decrease in UNTX (p for trend>0.05). Conclusions: Tobacco and environmental tobacco exposure are associated with SBAP and increased bone formation. The response of UNTX to these exposures is modified by race/ethnicity with non-Hispanic Whites and Mexican-Americans less sensitive to the resorptive effects of tobacco exposure on bone.

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