Sentiment Analysis Based on the Nursing Notes on In-Hospital 28-Day Mortality of Sepsis Patients Utilizing the MIMIC-III Database

Table 3

COX regression analysis of the association between sentiments and 28-day mortality.

Variables	Univariate analysis		Multivariate analysis
	HR (95% CI)		HR (95% CI)
Sentiment polarity score	0.458 (0.401, 0.524)	<0.001	0.499 (0.409, 0.610)	<0.001	-0.694
Sentiment subjectivity score	0.863 (0.657, 1.133)	0.289	0.710 (0.559, 0.902)	0.005	-0.342
SAPS-II score	1.040 (1.036, 1.045)	<0.001	1.034 (1.029, 1.040)	<0.001	0.034
Age (<40) (years)
40-59	3.027 (1.955, 4.687)	<0.001	1.217 (0.781, 1.886)	0.385	0.196
60-69	1.462 (0.941, 2.272)	0.091	1.479 (0.943, 2.321)	0.089	0.391
70-74	2.074 (1.328, 3.238)	0.001	1.048 (0.637, 1.723)	0.854	0.047
75-79	1.584 (0.969, 2.591)	0.067	1.030 (0.629, 1.687)	0.906	0.030
≥80	1.721 (1.058, 2.799)	0.029	1.612 (1.032, 2.520)	0.036	0.478
Gender (female)
Male	1.104 (0.936, 1.301)	0.240	1.104 (0.934, 1.306)	0.245	0.099
ICU type (CCU)
CSRU	0.335 (0.206, 0.545)	<0.001	0.397 (0.243, 0.650)	<0.001	-0.923
MICU	0.475 (0.351, 0.643)	<0.001	0.527 (0.388, 0.715)	<0.001	-0.641
SICU	0.254 (0.179, 0.361)	<0.001	0.299 (0.210, 0.426)	<0.001	-1.208
TSICU	0.240 (0.163, 0.354)	<0.001	0.280 (0.190, 0.414)	<0.001	-1.272

SAPS-II: Simplified Acute Physiology Score II; ICU: intensive care unit; CCU: coronary care unit; CSRU: cardiac surgery recovery unit; MICU: medical intensive care unit; SICU: surgical intensive care unit; TSICU: trauma/surgical intensive care unit; HR: hazard ratio; 95% CI: 95% confidence interval.