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

Table 4 Univariate analysis of differences in clinical features in pneumonia patients with/without QTc prolongation (1)

Factors	QTc > 0.44		QTc ≤ 0.44		*p value*
	Mean ± S.D.	n	Mean ± S.D.	n
Mean age (years)	82.58 ± 7.93	74	79.86 ± 7.51	162	0.0128
CURB-65	2.49 ± 0.99	74	2.18 ± 0.85	162	0.0414
PSI	112.71 ± 22.23	74	109.10 ± 21.50	162	0.3231
WBC (/mm3)	10,678.1 ± 4,806.3	74	10,060.2 ± 4,610.5	162	0.4693
CRP (mg/dL)	10.83 ± 7.05	74	8.00 ± 5.83	162	0.0048
Albumin (g/dL)	3.22 ± 0.56	74	3.50 ± 0.57	162	0.0024
Corrected Ca (mg/dL)	8.82 ± 0.58	61	8.67 ± 0.61	138	0.2376
HR (beat/minute)	87.76 ± 13.81	74	86.03 ± 14.78	162	0.4980
QTc (seconds)	0.463 ± 0.020	74	0.412 ± 0.024	162	< 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]. Corrected serum calcium concentration is cited from reference[14].

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