Table 6 Accuracy of characteristics, physical examination findings, and laboratory results associated with serious abdominal conditions in geriatric patients

Characteristics

 Male

0.5688642

0.58

0.55

1.31

0.75

0.08

0.96

 Beta-blocker use

0.5544314

0.31

0.80

1.55

0.86

0.09

0.95

 History of abdominal surgery

0.5735785

0.31

0.84

1.93

0.83

0.11

0.95

 Fever

0.5901871

0.25

0.93

3.59

0.81

0.18

0.95

 Nausea or vomiting

0.5607956

0.43

0.69

1.39

0.82

0.08

0.95

 Hematemesis

0.5134537

0.03

1.00

31.92

0.97

0.67

0.94

 Diarrhea

0.5402161

0.19

0.89

1.71

0.91

0.10

0.95

 Anorexia

0.5719104

0.25

0.89

2.35

0.84

0.13

0.95

 NEWS ≥ 5

0.6259126

0.31

0.94

5.40

0.74

0.25

0.96

 ESI levels 1–2

0.6348274

0.39

0.88

3.26

0.69

0.17

0.96

Physical examinations

 SBP (mmHg)

0.5906054

0.32

0.86

2.27

0.79

0.12

0.95

 RR ≥ 25 (breath/min)

0.596857

0.35

0.84

2.22

0.77

0.95

0.12

 Abdominal distention

0.5522316

0.31

0.79

1.51

0.87

0.09

0.95

 Abdominal tenderness

0.5647532

0.83

0.30

1.18

0.57

0.07

0.97

 RLQ tenderness

0.6572633

0.47

0.84

2.97

0.63

0.18

0.96

 LLQ tenderness

0.5647369

0.07

0.80

0.34

1.16

0.02

0.92

 Epigastrium tenderness

0.5759137

0.12

0.73

0.44

1.21

0.03

0.92

 Suprapubic tenderness

0.557072

0.00

0.89

0.00

1.13

0.00

0.92

 Abnormal bowel sounds

0.5565832

0.31

0.80

1.58

0.86

0.09

0.95

 Guarding

0.6172667

0.27

0.97

8.09

0.76

0.33

0.96

Laboratory results

 WBC ≥ 14,000 cells/mm³

0.567937

0.26

0.87

2.06

0.84

0.22

0.90

 RDW ≥ 13 (%)

0.5285879

0.77

0.28

1.08

0.80

0.12

0.90

 Lactate ≥ 2 mmol/L

0.6072184

0.42

0.80

2.05

0.73

0.34

0.84

EDLOS ≥ 4 h

0.7377422

0.81

0.67

2.44

0.29

0.14

0.98