However, we conducted several analyses testing for main and interactive effects of
age as a continuous variable for comparison, which replicated the results to be reported for the two age groups.
Adolescents filled in 69 items, which added up to a total anxiety score, ranging from 0 to 138: Higher scores indicate more anxiety symptoms, and was thus
treated as a continuous variable.
Although the model describes the development of antisocial behavior in terms of clinical diagnoses (e.g., CD and APD), in this study, we tested how well the model would describe the development of antisocial behaviors
measured as continuous variables in the general population.
This approach permitted us to consider breastfeeding
behavior as a continuous variable, an approach that is statistically more powerful than is categorizing this behavior.
Spearman's Rank Order Tests (rho) explored correlations between depressive symptoms (HADS -
D as a continuous variable) and deprivation.44 We report analysis by age, gender, deprivation, tumour site, place of birth and ethnicity.
Treating
ACEs as a continuous variable resulted in statistically significant associations between ACEs and all outcomes examined in unadjusted analyses with ORs ranging from 1.18 to 1.45 and minimal change after adjusting for potential confounders.
The study by Hennessy and colleagues consisted of seventy - six 6 — 11 - year - old children living in rural US communities and categorized parents into just one parenting style as opposed to treating parenting
style as a continuous variable.
We also modelled the developmental
measures as continuous variables (standardised to facilitate comparisons) and results were again consistent with those obtained using the dichotomised outcomes (tables available on request).
The effect of study size, year of birth, the method of ascertainment of infant feeding status (whether contemporary or recalled up to 71 y after birth), type of formula fed, study response rate (analyzed
as a continuous variable), study design (randomized controlled trial, case - control, or cohort), and whether infants were born pre - or full - term was examined by using metaregression and sensitivity analysis.
We also included total coffee consumption and caffeine intake simultaneously in the multivariate model
as continuous variables.
Sibling's age was measured
as a continuous variable.
Scores range from 0 to 54, in which higher scores indicate more depressive symptoms, and was therefore treated
as a continuous variable.
The ADHD symptoms scale is calculated, summarizing the ADHD Inattention and the ADHD Hyperactivity / Impulsivity scales, with a higher score indicating more symptoms of ADHD and was thus treated
as a continuous variable.