For the continuous variables NPRS, NDI, and TSK we used Pearson's r and for the categorical variable duration we used Spearman's rho.
Continuous data (age, and laboratory measures) summarized as medians (IQR) and categorical data (gender, duration of injection, and non-injection drugs) presented as proportions were tabulated.
Note that the 25th percentile is equal to the minimum categorical values of time duration where the minimum duration recorded was 5 minutes.
Testing a quadratic term in the trend analysis provided strong evidence to reject a purely linear association between categorical BMI and sleep duration (p <.001).
We have shown thus far that categorical information about interval duration contained in the firing of striatal populations at the time of stimulus offset can explain the precision of animals' judgments about duration.
Figure 1 shows the association between weekday sleep duration and categorical BMI stratified by gender: whereas a U-shaped association was found for girls (p <.001), the association for boys was linear (p <.001), not quadratic (p =.650).
Sex, chronological age group (18 29, 30 44, 45 64, ≥65 years), BMI status (non-overweight/non-obese, overweight, obese), educational attainment (primary, middle, high), and smoking status (current, former, never) were included as categorical covariables, and asthma duration in years as a continuous covariable.
The effect of covariates, including age (continuous), sex (categorical), batch number (categorical) and duration of disease (continuous) on the assessed immune phenotypes was assessed using linear regression.
Our study is therefore based on 374 subjects with complete data from both sources in the analyses where we used breastfeeding duration as a categorical variable.
We then added categorical variables for empiric antibiotic duration to the model to determine their mediating effect on the adjusted odds ratio of death for the prompted group variable (i.e. the degree to which the adjusted odds ratio for death for the prompted group changed with the addition of empiric antibiotic categories).
