These ages at injury were treated as continuous variables which were later categorized to assess the impact of age on concussion as well as cognitive-related symptom.
These mothers were later categorized as being in both groups for the purpose of illustrating results.
Principal component analysis was used to derive household wealth scores, which were later categorized into quintiles.
These were later categorized into 4 groups range - from "0 = no" to "5 = good" knowledge.
In contrast, three individuals treated during adolescence for "F30 39: Psychotic mood disorders" were later categorized in the sub-category of "F20 29: Schizophrenia, schizotypal and delusional disorders".
Three patients with a CAP diagnosis in the sub-category of "F20 29: Schizophrenia, schizotypal and delusional disorders" were later categorized as "F30 39: Psychotic mood disorders" in adulthood.
Health-related associations with exposure to IPV were also listed and audited for the previous year (March 2012 to March 2013), and were later categorized into three groups: physical, sexual and reproductive, and psychological.
Specific OCL exposures were not recorded in the database, but the timing of the patients' initial assessment was later categorized in reference to the war period (number of months before 27 December 2008 or after 17 January 2009).
Data on monthly household income was obtained using an open-ended question asking for the exact income which was later categorized into three categories: (a) less than RM 2000, (b) RM 2000 2999, and (c) RM 3000 and above.
Questions 3 and 4 were open, without predefined answers to choose from; however reported CVD risk factors (question 4) were later categorized into four groups: hyperglycemia or diabetes, smoking, hyperlipidemia and obesity.
However, a part of this increase can be due to the fact that some Swiss degrees that were categorized as secondary at the beginning of the 2000 decade, such as degrees from teacher colleges, were later re-categorized as tertiary before the 2009 survey.
