Exact(1)
This was minimised as far as possible by multiple sampling before and after surgery, and determining the mean marker level at each time point.
Similar(59)
An exploratory indication of comparative variation between hairs from the same subjects at the same time, and from between different subjects, was possible using the mean marker levels per hair.
This mainly involved studies, which showed no difference in mean or median marker levels among groups.
26 Mean tumor marker levels before and after the last preoperative chemotherapy were compared by paired-samples t test.
At last follow-up, mean inflammatory marker levels remained normal in the majority of patients (ESR, CRP, and SAA in 93% and S100A12 in 86%).
The percentage change between the mean CVD marker levels for non-smokers in the lowest compared with highest cotinine categories were calculated as [ mean ≤0.05 ng/mL) − (mean 0.71 15 ng/mL /mean ≤0.05 ng/mL].
In the test subset, mean baseline marker levels were similar among the treatment groups, with the exception of levels of myeloperoxidase, thyroxine-binding globulin, vascular cellular adhesion molecule-1, and TNF-α (data not shown).
Therefore, we used cluster analysis to statistically determine which mean hormone marker levels cluster together to form specific hormone profiles, and multinomial logistic regression to determine whether age, BMI and race/ethnicity groups were more likely to be associated with different sex steroid hormone marker profiles.
A student's t-test (two-sided) was performed to compare the mean serum marker levels among groups stratified by clinical and pathological variables, and Pearson's correlation was performed to compare maximum tumour length and number of lymph node metastases with serum biomarker levels.
Effect estimates are presented as percent change of geometric mean of the blood marker level (IL-6, CRP) and change of the arithmetic mean level (fibrinogen, percent of overall mean) together with 95% confidence intervals (CIs) based on an increase in air pollution concentrations from the first to the third quartile [interquartile range (IQR)].
Markers tested on this expanded dataset were assessed by a number of criteria, including sensitivity at 98% specificity, AUC, and mean normalized serum marker levels in specific subsets of cases and controls (Table 3).
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