Table 3.

Phenotypic and genetic correlation between different heart rates for individual ECG parameters.

Parameter/Frequency comparison	Phenotypic correlation	Genetic correlation between rates	Contribution of genetic factors to phenotypic co-variance
Tp-Te
Low-medium	0.76 (0.67–0.83)	0.88 (0.73–0.97)	68% (39–86%)
Low-high	0.56 (0.41–0.67)	0.56 (0.20–0.80)	54% (14–82%)
Medium-high	0.76 (0.68–0.83)	0.89 (0.72–0.97)	66% (32–87%)
Th
Low-medium	0.93 (0.90–0.95)	0.98 (0.94–1.00)	74% (55–85%)
Low-high	0.82 (0.75–0.87)	0.91 (0.79–1.00)	72% (51–85%)
Medium-high	0.93 (0.90–0.95)	0.97 (0.93–1.00)	66% (45–79%)
QT
Low-medium	0.70 (0.61–0.78)	0.77 (0.57–0.92)	69% (42–86%)
Low-high	0.47 (0.32–0.59)	0.52 (0.15–0.78)	54% (14–81%)
Medium-high	0.72 (0.64–0.79)	0.84 (0.62–0.95)	52% (24–72%)
QRS
Low-medium	0.94 (0.92–0.96)	0.97 (0.84–1.00)	42% (12–65%)
Low-high	0.86 (0.81–0.90)	0.95 (0.79–1.00)	46% (13–69%)
Medium-high	0.90 (0.87–0.93)	1.00 (0.95–1.00)	46% (15–68%)

99% CIs are shown in parentheses.