Table 4 Multivariate binary logistic regression model with modified Hb and SBP categories to predict for safe discharge

Female gender

1.38 (0.866–2.19)

0.176

0.320

No previous LGITB admission

2.11 (1.21–3.69)

0.008

0.749

No DM

1.17 (0.679–2.0)

0.580

0.152

No IHD

2.59 (1.24–5.40)

0.011

0.951

No chronic liver disease

2.83 (0.531–15.1)

0.223

1.04

No usage of antiplatelets

1.57 (0.801–3.07)

0.190

0.449

DRE findings of no blood

3.31 (1.88–5.85)

 < 0.001

1.20

Presence of abdominal tenderness

1.87 (0.850–4.10)

0.120

0.624

Absence of syncope or dizziness

2.51 (1.55–4.08)

 < 0.001

0.922

SBP at triage (reference: SBP ≥ 135 mmHg)

 SB P  < 90 mmHg

0.0562 (0.00773–0.409)

0.004

-2.88

 SBP 90-119 mmHg

0.410 (0.219–0.768)

0.005

- 0.891

 SBP 120-134 mmHg

0.540 (0.307–0.952)

0.033

- 0.616

 DBP at triage

0.986 (0.964–1.01)

0.233

- 0.014

 HR at triage

0.988 (0.974–1.00)

0.098

- 0.012

Initial Hb count (reference: Hb ≥ 13.0 g/dL)

 Hb < 10 g/dL

0.0328 (0.0163–0.0661)

 < 0.001

- 3.418

 Hb 10–11.9 g/dL

0.209 (0.0978–0.447)

 < 0.001

- 1.57

 Hb 12–12.9 g/dL

0.346 (0.192–0.622)

 < 0.001

- 1.06

 Platelet count

1.0 (0.997–1.00)

0.828

0.00

 INR level

0.920 (0.621–1.36)

0.66

- 0.084

 APTT level

1.04 (0.981–1.09)

0.237

0.035

 Urea level

0.994 (0.918–1.09)

0.908

- 0.006

 Bicarbonate level

1.01 (0.924–1.11)

0.731

0.014

 Creatinine level

0.999 (0.996–1.00)

0.475

- 0.001