Association of abnormal electrocardiograph metrics with prolonged recovery time in incident hemodialysis patients

BMC Nephrology

Table 2 Association of ECG metrics with recovery time (RT) after dialysis

Exposure	Model 1				Model 2				Model 3
	N	RT Difference	95% CI	P	N	RT Difference	95% CI	P	N	RT Difference	95% CI	P
QT Interval, per 10.0 ms increase	242	4.1	(−1.0, 8.3)	0.1	242	5.1	(−1.0, 9.4)	0.06	242	5.1	(0.0, 10.5)	0.04
QTc Interval, per 10.0 ms increase	242	6.2	(2.0, 11.6)	0.009	242	6.2	(1.0, 11.6)	0.01	242	6.2	(2.0, 11.6)	0.007
QRST angle, per 10 degree increase	221	1.0	(−3.9, 5.1)	0.9	221	1.0	(−3.9, 6.2)	0.8	221	0.0	(−4.9, 5.1)	0.9
Heart rate, per 100 ms increase	242	−7.7	(−21.3, 8.3)	0.3	242	−4.9	(−19.7, 17.4)	0.5	242	−4.9	(− 19.7, 12.7)	0.6
Heart Rate Variance, per 100 ms² increase	242	−1.0	(−3.0, 0.0)	0.05	242	−1.0	(−3.0, 0.0)	0.05	242	−1.0	(−2.0, 0.0)	0.08
Left Ventricular Hypertrophy^a	242	12.7	(−40.0, 113.8)	0.7	242	16.2	(−38.7, 120.3)	0.6	242	10.5	(−44.0, 118.1)	0.8

Model 1 includes the main exposure (one of the ECG measurements)
Model 2 includes model 1, age, sex, and race
Model 3 includes model 2, total depression score, LVMI, Charlson comorbidity index, serum ionized calcium, serum magnesium, and the use of antihypertensive medication
^aFor left ventricular hypertrophy, Model 3 does not include LVMI

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