TABLE 4 The ratio of decreased heart rate variability before and after surgery
| Timing time domain | Before surgery (1) (n = 119) | After 7 days (2) (n = 109) | After 3 months (3) (n = 102) | After 6 months (4) (n = 102) | |
|---|---|---|---|---|---|
| Decreased heart rate variability (n, %) | Yes | 34 (28.6) | 57 (52.3) | 20 (19.6) | 13 (12.7) |
| No | 85 (71.4) | 52 (47.7) | 82 (80.4) | 89 (87.3) | |
| p (1,2) < 0.001 | p (1,3) < 0.05 | p (1,4) < 0.05 | |||
|
ASDNN (ms) |
<30 | 23 (19.3) | 50 (45.9) | 14 (13.7) | 6 (5.9) |
| ≥30 | 96 (80.7) | 59 (54.1) | 88 (86.3) | 96 (94.1) | |
| p | p (1,2) < 0.05 | p (1,3) > 0.05 | p (1,4) < 0.05 | ||
|
rMSSD (ms2) |
<15 | 18 (15.1) | 28 (25.7) | 10 (9.8) | 7 (6.9) |
| ≥15 | 101 (84.9) | 81 (74.3) | 92 (90.2) | 95 (93.1) | |
| p | p (1,2) > 0.05 | p (1,3) > 0.05 | p (1,4) < 0.05 | ||
|
pNN 50 (%) |
<0.75 | 26 (21.8) | 34 (31.2) | 13 (12.7) | 11 (10.8) |
| 93 (78.2) | 75 (68.8) | 89 (87.3) | 91 (89.2) | ||
| p | p (1,2) > 0.05 | p (1,3) > 0.05 | p (1,4) < 0.05 | ||
|
SDNN (ms) |
<50 | 10 (8.4) | 23 (21.1) | 2 (2.0) | 1 (1.0) |
| 109 (91.6) | 86 (78.9) | 100 (98.0) | 101 (99.0) | ||
| p | p (1,2) < 0.05 | p (1,3) < 0.05 | p (1,4) < 0.05 | ||
|
SDANN (ms) |
<40 | 6 (5.0) | 22 (20.2) | 2 (2.0) | 1 (1.0) |
| 113 (95.0) | 87 (79.8) | 100 (98.0) | 101 (99.0) | ||
| p | p (1,2) < 0.05 | p (1,3) > 0.05 | p (1,4) > 0.05 | ||