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Table 2 Participant characteristics depending on the total number of SLEs among 2,730 females

From: Association between stressful life events and resting heart rate

Variables Total number of SLEs p
0 (n = 2,220) 1 (n = 260) 2 (n = 107) ≥3 (n = 143)
Age, years 55.7≥8.6 58.6≥10.2 59.1≥9.6 54.8≥8.9 <0.001a
Body mass index, kg/m2 24.8≥3.3 24.8≥3.6 25.2≥3.2 25.0≥2.8 0.540a
Systolic BP, mmHg 119.6≥18.2 122.9≥19.0 122.4≥18.5 118.8≥17.5 0.020a
Diastolic BP, mmHg 72.2≥10.2 71.7≥10.2 71.3≥9.3 71.3≥10.0 0.539a
Heart rate, bpm 68.0≥9.6 66.3≥10.4 64.9≥9.6 64.2≥8.9 <0.001a
Heart rate on ECG, bpm 64.3≥9.1 62.8≥9.3 61.7≥8.7 62.1≥11.3 <0.001a
PR interval on ECG, ms 164.4≥21.0 166.8≥21.0 169.3≥25.5 166.3≥21.1 0.038a
QRS duration on ECG, ms 87.5≥14.7 85.6≥19.9 84.7≥23.6 82.6≥18.5 0.005a
BUN to Cr ratio 17.2≥4.9 18.2≥5.1 17.3≥4.5 17.4≥4.6 0.017a
Hematocrit, % 39.3≥3.0 40.0≥2.9 39.8≥3.2 39.1≥3.2 <0.001a
Total body water, kg 29.7≥4.5 30.3≥5.6 31.0≥6.5 31.4≥6.02 <0.001a
Bradycardia 406 (18.3) 59 (22.7) 29 (27.1) 44 (30.8) <0.001b
Thyroid disease history 98 (4.4) 14 (5.4) 7 (6.5) 4 (2.8) 0.473c
Liver disease history 10 (0.5) 0 (0.0) 0 (0.0) 1 (0.7) 0.589c
Hypertension 753 (33.9) 100 (38.5) 41 (38.3) 52 (36.4) 0.390b
Hypertension treatment 524 (23.6) 72 (27.7) 29 (27.1) 42 (29.4) 0.201b
Oral contraceptive use 6 (0.3) 1 (0.4) 0 (0.0) 1 (0.7) 0.744c
Hormone therapy 117 (5.3) 6 (2.3) 2 (1.9) 7 (4.9) 0.087c
Regular exercise status 724 (32.6) 95 (36.5) 34 (31.8) 53 (37.1) 0.438b
Cigarette smoking      
 Never 2,134 (96.1) 252 (96.9) 104 (97.2) 139 (97.2) 0.976c
 Former 35 (1.6) 3 (1.2) 1 (0.9) 2 (1.4)  
 Current 51 (2.3) 5 (1.9) 2 (1.9) 2 (1.4)  
Alcohol drinking      
 Never 1,560 (70.3) 185 (71.2) 79 (73.8) 88 (61.5) 0.006c
 Former 70 (3.2) 18 (6.9) 3 (2.8) 9 (6.3)  
 Current 590 (26.6) 57 (21.9) 25 (23.4) 46 (32.2)  
  1. Data are expressed as the mean≥SD or the number (%).
  2. ap-value was calculated by an ANOVA between groups.
  3. bp-value was calculated by a Chi-square test between groups.
  4. cp-value was calculated by a Fisher’s exact test between groups.