Table 1 Item raw score, item logit measures and item fit statistics for vital parameters and exclusion symptoms

Free airways

262

-5.33

0.97

0.06

0.62

-0.38

Breathing frequency within 8–25/min

210

-2.16

1.02

.026

1.31

1.62

Saturation above or equal to 92 %

206

-2.04

0.98

-0.14

1.33

1.81

Heart rate between 50-100 s/min

202

-1.89

0.79

2.32

0.71

-2.04

Blood pressure (≥100 mm Hg)

242

-3.68

0.94

-0.24

1.28

0.77

Degree of conciousness

222

-2.81

0.92

-0.56

0.83

-0.59

Temperature

221

-3.09

0.92

-0.45

0.74

-0.81

Urinary catheter

14

2.97

0.97

-0.04

1.40

0.97

Dizziness

20

2.56

0.91

-0.47

1.27

0.77

Breathing problem

18

2.68

1.08

0.45

2.55

2.93

Chest pain

26

2.22

1.01

0.14

2.37

3.03

Diabetes

12

3.14

1.00

0.08

1.18

0.52

Fever (e.g. chill)

16

2.82

1.02

0.16

2.24

2.41

Affected general health

35

1.87

1.04

0.34

1.72

2.10

Back pain

17

2.75

0.96

-0.15

0 .67

-0.81