Table 1.

Parameter variables and related status descriptions in CRABNs.

Parameter variable	State description	Parameter variable	State description
${\mathrm{X}}_1$: Age	Low: 18–50	$X_{11}$: Concomitant signs	Low: 0–1
	Medium: 51–70	(numbers)	Medium: 2–3
	High: >70 or < 18		High: >3
${\mathrm{X}}_2$: Comorbidities	Low: No	$X_{12}$: Number of damaged lobes	Low: 0–1
(kinds)	Medium: 1		Medium: 2–3
	High: >1		High: 4–5
${\mathrm{X}}_3$: Body Mass Index	Low: <30	$X_{13}$: Number of immune cells	Low: 2.2–5.1
	Medium: 31–40	(*10E9/L)	Medium: 5.1–12.1
	High: >40		High: 12.1–22.8
${\mathrm{X}}_4$: Living with vulnerable people	Low: 0	$X_{14}$: Myocardial index	Low: 0.5–1.9
(numbers)	Medium: 1	(ug/ml)	Medium: 1.9–4.3
	High: >1		High: >4.3
${\mathrm{X}}_5$: Temperature	Low: 35–38.5	$X_{15}$: Protein content	Low: 0.1–9.8
(℃)	Medium: 38.6–40	(mg/l)	Medium:9.8–24.1
	High: >40		High: >24.1
${\mathrm{X}}_6$: Respiratory rate	Low: <20	$X_{16}$: Blood oxygen	Low: >80
(breaths/min)	Medium: 20–24	(mmHg)	Medium: 70–80
	High: >24		High: 65–70
${\mathrm{X}}_7$: Heart rate	Low: 50–100	$B_1$: Epidemiological History Variables	Good: 80–100
(bpm)	Medium: 111–130		Moderate: 60–80
	High: >130		Poor: 0–60
${\mathrm{X}}_8$: Duration of symptoms	Low: <3	$B_2$: Clinical Symptoms Variables	Good: 80–100
(days)	Medium: 4–7		Moderate: 60–80
	High: >7		Poor: 0–60
${\mathrm{X}}_9$: Degree of opacity for lung	Low: 0–2	$B_3$: Imaging Examination Variables	Good: 80–100
	Medium: 2–4		Moderate: 60–80
	High: 4–6		Poor: 0–60
${\mathrm{X}}_{10}$: Extent of lung involvement	Low: 0–3	$B_4$: Laboratory Examination Variables	Good: 80–100
	Medium: 3–5		Moderate: 60–80
	High: 5–8		Poor: 0–60