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The research questions reflected the study purpose and they were dichotomized into two groups: main and supplementary.
Because both instruments contain three levels, they were dichotomized into two levels: no difficulty versus any difficulty (some or severe difficult).
Variables that assessed satisfaction levels with work conditions by health personnel on a four-point Likert scale from 1 = "very disappointing" to 4 = "very satisfactory" were dichotomized into two by combining 1 & 2 into "disappointing" and 3 & 4 into "satisfactory".
Age was dichotomized into two groups: < 35 and ≥ 35 years.
Age was dichotomized into two categories: 6 7 years; and 8 12 years.
Patient age was dichotomized into two categories (< 60 years or ≥ 60 years).
CO was dichotomized into two categories, < 4.5 L/min and ≥ 4.5 L/min.
Participants were dichotomized into two age groups (aged 40 years and below, and over 40 years).
Both were dichotomized into two categories: top box response (7) versus all others (1 6).
Physical activity was dichotomized into two groups (none versus moderate to vigorous) using the International Physical Activity Questionnaire.
These data were dichotomized into two categories: single deployment or multiple deployments.
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CEO of Professional Science Editing for Scientists @ prosciediting.com