Table 2 Mean and 95 % confidence interval (CI) of RMSSD, SDNN and RR interval by demographic characteristics
Characteristic | RMSSD (ms) | SDNN (ms) | RR (ms) | |||
|---|---|---|---|---|---|---|
Mean | 95 % CI | Mean | 95 % CI | Mean | 95 % CI | |
Sex (%) | ||||||
Male | 40.72 | (39.07, 42.38) | 34.20 | (32.98, 35.43) | 1010 | (1003, 1016) |
Female | 44.43 | (43.08, 45.78) | 35.34 | (34.36, 36.32) | 968 | (963, 973) |
Age group (%) | ||||||
18–24 | 63.33 | (59.82, 66.85) | 49.20 | (46.76, 51.64) | 981 | (971, 991) |
25–34 | 50.37 | (48.22, 52.52) | 40.30 | (38.61, 41.98) | 988 | (978, 998) |
35–44 | 37.56 | (36.14, 38.97) | 31.41 | (30.27, 32.55) | 985 | (976, 993) |
45–54 | 30.32 | (29.38, 31.26) | 26.13 | (25.39, 26.87) | 994 | (987, 1001) |
55–64 | 26.51 | (25.39, 27.63) | 23.59 | (22.59, 24.58) | 992 | (984, 1001) |
65+ | 27.59 | (24.63, 30.54) | 23.20 | (20.71, 25.68) | 1006 | (991, 1022) |
Obese (BMI ≥ 30 kg/m2) | ||||||
Yes | 43.49 | (42.09, 44.89) | 35.55 | (34.50, 36.61) | 1001 | (996, 1006) |
No | 41.20 | (39.33, 43.08) | 33.49 | (32.22, 34.76) | 966 | (959, 973) |
Abdominal adiposity | ||||||
Yes | 44.50 | (42.92, 46.08) | 36.64 | (35.44, 37.83) | 1010 | (1004, 1016) |
No | 40.89 | (39.37, 42.42) | 33.05 | (31.98, 34.13) | 967 | (962, 973) |
Current smoking | ||||||
Yes | 42.07 | (40.96, 43.17) | 34.22 | (33.44, 35.01) | 985 | (981, 990) |
No | 44.72 | (41.75, 47.68) | 36.83 | (34.63, 39.02) | 998 | (988, 1009) |
Beta blocker use | ||||||
Yes | 43.14 | (41.97, 44.30) | 35.24 | (34.40, 36.07) | 987 | (982, 991) |
No | 31.91 | (28.80, 35.01) | 24.84 | (22.65, 27.03) | 1042 | (1024, 1060) |
Non-hydropyridine calcium channel blocker use | ||||||
Yes | 43.11 | (41.96, 44.27) | 35.16 | (34.33, 35.98) | 989 | (984, 993) |
No | 25.92 | (22.42, 29.42) | 22.14 | (19.73, 24.56) | 981 | (959, 1003) |
Sympathomimetic medication use | ||||||
Yes | 42.76 | (41.62, 43.91) | 34.88 | (34.07, 35.69) | 990 | (986, 995) |
No | 43.04 | (33.48, 52.59) | 35.45 | (28.13, 42.78) | 936 | (917, 954) |