Various components of structural system for the tunnels which are excavated in jointed rocks with weak ground condition were categorized and incorporating elements were specified.
Accordingly, each condition was categorized into one of the four age-confound categories: no age-confound, confound favoring old, confound favoring young, and confounds with unknown effect.
The socioeconomic condition was categorized as monthly income <500 € or >500 €.
Working condition was categorized as mostly seated work (response alternative 1) and heavy work (response alternatives 2-4).
Seriousness of medical condition was categorized according to the Clinical Criteria Disease Staging (CCDS) system [ 23] and pooled; for AMI: stages 3.1, 3.2, 3.3 stages 3.4-3.6 3.4-3.6ges 3.7-3.9; for hip frandure: stages 1.1–1.2 and stages 2.3.7-3.9 3.7-3.9
Chronic disease was assessed with the question "Do you have any permanent or chronic illness or any defect, trouble or injury that reduces your working capacity or functional ability?" Those who answered positively were categorised as having a chronic condition and those who indicated no chronic condition were categorized into the comparison group.
Daylight parameters were derived using luminous efficacy approach and the sky conditions were categorized based on common climatic variables.
The boundary conditions are categorized as follows: Output and input flow to the border: input pressure, output pressure, velocity input, velocity output, input mass flow, output mass flow, free entrance (ventilation), free output (ventilation), blower or fan, far-reaching pressure field, and blower output.
Patients without these conditions were categorized as non ischemic.
Those with the most severe conditions are categorized as children with special health care needs.
