Table 3.
Sample Collection Procedures Sample collected after resting period of 20–45 min with participant in supine position Sample collected following overnight fast Rule out acute infection via collection of body temperature and vital signs* |
Assaying Procedures Run all assays in duplicate with coefficients of variation under 10% Report inter- and intra-assay coefficients Report assay detection and sensitivity limits |
Data Cleaning and Statistical Methods Report proportion of non-detectable values and patterns of missingness, and number of high out-of-range CRP values, and include all available data (no listwise deletion) Visualize CRP values to determine outliers Winsorization for non-detectable and high out-of-range values (three standard deviations) Correct and transparent reporting of handling of non-normal data, including reporting of kurtosis and skewness statistics Report results from continuous analyses |
Control variables to assess and statistically adjust (as necessary) Demographic Variables Age Sex Race/ethnicity Health Variables Body mass index, waist circumference, or waist-to-hip ratio Chronic medical conditions or health markers (e.g., cholesterol, triglycerides)* Substance Variables Nicotine use (current and former)* Alcohol use (frequency and amount)* Caffeine use* Medication Variables Antidepressant use (frequency, type & dose) NSAID use (frequency and dose)* Statin/anti-hypertensive use (frequency and dose) Psychosocial Variables SES and/or education Additional variables to consider (included in quality score) Physical activity/exercise Sleep deprivation |
Indicates that it is appropriate for the study to exclude based on this variable or to exclude based on acute use.