Table 2. Mean heart rate over 24 h and during sleep and awake periods in groups that differ in familial longevity status or chronological age.

	Offspring of long-lived families (N = 37)	Partners of the offspring (N = 36)	Middle-aged* (N = 73)	Young (N = 35)	P value+	P value++
Heart rate - 24 h [bpm]	71.49 (8.93)	71.66 (7.45)	71.63 (8.18)	75.39 (8.80)	0.929	0.028
Heart rate - sleep period [bpm]	62.55 (7.28)	62.68 (7.24)	62.66 (7.21)	60.89 (6.26)	0.941	0.209
Heart rate - awake period [bpm]	77.09 (10.31)	76.75 (8.44)	76.97 (9.37)	83.42 (10.29)	0.874	0.001

Data presented as estimated mean (standard deviation). The linear regression analyses between offspring of long-lived families and their partners as controls were adjusted for sex and calendar age. The linear regression model analyses between the middle-aged group and young were adjusted for sex. ^*Data of offspring and partners combined. ⁺P-value for difference between offspring of long-lived parents and their partners as controls. ⁺⁺P-value for difference between middle-aged group and young.