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Table 2 The association between the median of hospitalization cost and the potential risk factors using quantile regression in patients with ≤ 9 and > 9 hospitalization days

From: Which patients bring the most costs for hospital? A study on the cost determinants among COVID-19 patients in Iran

Covariate

 ≤ 9 Days

 > 9 Days

Estimate (95% CI)

P-value

Estimate (95% CI)

P-value

Gender (male)

 Female

0.10 (0.0,0.20)

0.058

0.09 (− 0.13,0.31)

0.431

Age (< 60 year)

 ≥ 60 year

− 0.08 (− 0.19,0.03)

0.172

− 0.27 (− 0.51,− 0.02)

0.031

Comorbidity disease (no)

 Diabetes

− 0.01 (− 0.22,0.20)

0.924

− 0.28 (− 0.66,0.10)

0.147

 Cardiovascular

0.28 (0.10,0.46)

0.003

0.43 (0.0,0.86)

0.048

 Hypertension

0.09 (− 0.06,0.23)

0.241

− 0.01 (− 0.32,0.3)

0.969

 Multiple

− 0.04 (− 0.21,0.12)

0.619

− 0.11 (− 0.41,0.19)

0.473

Pulmonary lung (normal)

 Crackling (rales)

− 0.03 (− 0.16,0.10)

0.644

− 0.04 (− 0.3,0.22)

0.780

 Wheezing

0.4 (0.02,0.78)

0.042

0.36 (− 0.47,1.20)

0.392

SPO2 (> 90)

 ≤ 90

0.2 (0.09,0.31)

 < 0.001

0.04 (− 0.32,0.39)

0.844

CRP (negative)

 Positive

0.2 (0.08,0.32)

0.002

0.08 (− 0.20,0.35)

0.586

PT (11–13 Sec)

 > 13

− 0.07 (− 0.17,0.04)

0.216

− 0.19 (− 0.42,0.05)

0.125

LDH (≤ 942 U/L)

 > 942

0.46 (0.25,0.67)

 < 0.001

0.04 (− 0.24,0.32)

0.788

NA (136–145 mEq/L)

 < 136

0.15 (0.03,0.27)

0.012

0.09 (− 0.12,0.30)

0.391

 > 145

0.37 (− 0.13,0.86)

0.144

0.52 (− 0.90,1.94)

0.469

K (3.5–5.1 mEq/L)

 < 3.5

− 0.17 (− 0.37,0.04)

0.117

− 0.16 (− 0.57,0.25)

0.434

 > 5.1

0.21 (− 0.17,0.59)

0.282

− 0.07 (− 0.64,0.51)

0.821

Lymphocytes (20–40%)

 < 20

0.13 (0.01,0.24)

0.039

0.05 (− 0.18,0.28)

0.667

 > 40

0.41 (− 0.12,0.94)

0.131

0.12 (− 1.38,1.61)

0.879

WBC (4.5–11 mg/dL)

 < 4.5

0.03 (− 0.09,0.15)

0.634

− 0.31 (− 0.56,− 0.05)

0.018

 > 11

0.08 (− 0.12,0.28)

0.417

0.15 (− 0.27,0.57)

0.474

ICU (no)

 Yes

0.69 (0.54,0.84)

 < 0.001

1.01 (0.79,1.22)

 < 0.001