Exact(9)
We repeated this analysis using each trimester as the initial reference trimester (i.e., trimester a).
The last dental examination will be carried out in the 3rd trimester as the final evaluation data.
The difference between the preconception period and the first trimester was not significant by transforming the first trimester as the reference group (p = 0.053).
However, when we conducted a sensitivity analysis using the first trimester as the critical period for seasonal adjustment rather than the month before birth, we found null and protective effects, contrary to expectation.
We chose the 2-h value in third trimester as the main outcome instead of the entire curve in third trimester, due to the clinical relevance of this value in pregnancy care.
We defined the first trimester of pregnancy as weeks 1 13, the second trimester as weeks 14 26, and the third trimester as the period from week 27 until birth.
Similar(51)
Information on in utero exposure tobacco smoke by trimester as well as the number of mothers who stopped smoking during pregnancy was not ascertained, limiting our ability to assess critical windows of exposure.
The author's found that D-dimer concentrations in both subjects and controls increased significantly from the first to the second trimester, as well as from the second to the third trimester.
Insulin levels were measured initially by radioimmunoassay from samples taken from mothers in the second trimester as well as after the twentieth week of pregnancy.
We analyzed average monthly concentration levels in the drinking water during each pregnancy trimester as well as during the entire pregnancy.
We described NO2 and benzene levels by trimester as well as throughout the entire pregnancy and calculated the correlations between them for each cohort.
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