Multiple logistic regression analysis of risk factors in elderly pneumonia patients: QTc interval prolongation as a prognostic factor

Table 1 Univariate analysis of differences in clinical features in pneumonia patients (1)

Factors	30-day survivors		30-day nonsurvivors		*p value*
	Mean ± S.D.	n	Mean ± S.D.	n
Mean age (years)	78.20 ± 7.62	210	84.37 ± 8.32	39	< 0.0001
CURB-65	2.01 ± 0.71	210	3.56 ± 0.72	39	< 0.0001
PSI	85.10 ± 22.92	210	117.08 ± 19.16	39	< 0.0001
WBC (/mm ³ )	10,203.8 ± 4,409.3	210	10,053.6 ± 5,441.5	39	0.4986
CRP (mg/dL)	8.57 ± 6.14	210	9.12 ± 6.07	39	0.6169
Albumin (g/dL)	3.53 ± 0.52	210	2.87 ± 0.57	39	< 0.0001
HR (beat/minute)	85.09 ± 13.13	210	94.23 ± 21.22	39	0.0541
QTc (seconds)	0.424 ± 0.032	202	0.456 ± 0.007	34	< 0.0001

Data represent the numbers of patients. CRP, C-reactive protein; PSI, pneumonia severity index; WBC, white blood cell count. All data are expressed as means ± standard deviation of the means. Counting points of CURB-65 and PORT-study as the severity of pneumonia are cited from reference[3] and[4].

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