Table 5.

Contingency tables for models incorporating MEWS with or without echocardiography or LUS

	Died	Survived	All
Mortality with MEWS alone
High risk	24	62	86
Low risk	5	109	114
Sensitivity 83%, specificity 63%, NPV 96%, PPV 28%, accuracy 66%
Mortality MEWS with echocardiography specific
High risk	20	22	42
Low risk	9	149	158
Sensitivity 69%, specificity 87%, NPV 94%, PPV 48%, accuracy 85%
Mortality MEWS with LUS Specific
High risk	15	32	47
Low risk	14	139	153
Sensitivity 52%, specificity 81%, NPV 91%, PPV 32%, accuracy 77%
Mortality MEWS with echocardiography sensitive
High risk	25	93	118
Low risk	4	78	82
Sensitivity 86%, specificity 46%, NPV 95%, PPV 21%, accuracy 52%
Mortality MEWS with LUS sensitive
High risk	26	82	108
Low risk	3	89	92
Sensitivity 89%, specificity 52%, NPV 97%, PPV 24%, accuracy 58%

	Mechanically ventilated	No mechanical ventilation	All
Mechanical ventilation MEWS alone
High risk	16	70	86
Low risk	8	106	114
Sensitivity 66%, specificity 60%, NPV 93%, PPV 13%, accuracy 61%
Mechanical ventilation MEWS with echocardiography specific
High risk	8	34	42
Low risk	16	142	158
Sensitivity 33%, specificity 81%, NPV 89%, PPV 19%, accuracy 75%
Mechanical ventilation MEWS with LUS specific
High risk	11	36	47
Low risk	13	140	153
Sensitivity 46%, specificity 79%, NPV 91%, PPV 23%, accuracy 75%
Mechanical ventilation MEWS with echocardiography sensitive
High risk	19	99	118
Low risk	5	77	82
Sensitivity 79%, specificity 44%, NPV 94%, PPV 16%, accuracy 48%
Mechanical ventilation MEWS with LUS sensitive
High risk	20	88	108
Low risk	4	88	92
Sensitivity 83%, specificity 50%, NPV 96%, PPV 18%, accuracy 54%

NPV, Negative predictive value; PPV, positive predictive value.