Table 3.

Classes for key sentences.

Name	Definition	Example
Patient	A sentence containing information of the patients in the study.	A convenience sample of 24 critically ill, endotracheally intubated children was enrolled before initiation of suctioning and after consent had been obtained.
Result	A sentence containing information about the results of the study.	Large effect sizes were found for reducing PTSD symptom severity (d = −.72), psychological distress (d = −.73) and increasing quality of life (d = −.70).
Intervention	A sentence containing information about the procedures of interest and the ones as the comparison /control.	Children 6 to 35 months of age received 0.25 ml of intramuscular inactivated vaccine, and those 36 to 59 months of age received 0.5 ml of intramuscular inactivated vaccine. (Note: This is also a Patient sentence.)
Study Design	A sentence containing information about the design of the study.	A prospective international observational cohort study, with a nested comparative study performed in 349 intensive care units in 23 countries.
Research Goal	A sentence containing information about what the study aims to achieve.	The aim of this study was to investigate the balance between pro- and anti-inflammatory mediators in SA.