Table 3.
Comparison between parameters of 24hr Holter of diabetic patients in relation to coronary calcium score
| Variables | Coronary calcium score | ||||
|---|---|---|---|---|---|
| Negative Median Mean ± SD (Interquartile range) N = 57 | Positive Median Mean ± SD (Interquartile range) N = 5 | Test t/Z | P-value | ||
| SDARR (ms) | 32.0 32.2 ± 12.7 (22.5 – 41.0) |
35.0 31.7 ± 6.7 (24.0- 36.0) |
-0.04 | 0.9# | |
| Average HR (BPM) | 90.3 ± 9.8 | 85.5 ± 11.1 | 0.9 | 0.4 | |
| Maximum HR (BPM) | 162.8 ± 14.5 | 160.0 ± 15.9 | 0.37 | 0.7 | |
| Minimum HR (BPM) | 57.7 ± 10.5 | 50.5 ± 8.4 | 1.34 | 0.9 | |
| Mean RR interval | 616.0 ± 82.5 | 574.5 ± 36.6 | 0.09 | 0.3 | |
| Median RR interval | 614.2 ± 82.5 | 572.8 ± 38.5 | 1.84 | 0.3 | |
| Standard deviation RR (SDRR)(ms) | 33.5 34.8 ± 14.0 (24.0- 44.0) |
33.0 31.8 ± 5.7 (25.8 – 36.5) |
-0.3 | 0.7# | |
| Mean difference RR (DRR)(ms) | 22.0 24.8 ± 11.7 (15.0 – 33.3) |
21.8 23.1 ± 6.7 (17.5 – 30.1) |
-0.2 | 0.9# | |
| Standard deviation difference RR (SDDRR)(ms) | 18.0 39.9 ± 140.4 (12.5 – 25.1) |
17.5 17.4 ± 4.2 (13.6 – 21.0) |
-0.3 | 0.8# | |
| Percentage of RR > 50 msec (PNN50)(%) | 11.1 12.2 ± 8.8 (6.0 – 18.0) |
11.5 11.3 ± 6.1 (5.3 – 17.0) |
-0.2 | 0.9# | |
| The square root of the mean squared difference of successive R- R interval (RMSSD) (ms) | 27.5 30.1 ± 15.3 (18.3 – 41.0) |
27.5 28.8 ± 10.1 (19.8 – 39.0) |
-0.1 | 0.9# | |
| Corrected QT interval (QTc) (ms) | 381.9 ± 28.6 | 377.0 ± 29.6 | 0.33 | 0.7 | |
| ST segment deviation | 0.9 0.9 ± 0.4 (0.7 – 1.3) |
1.1 1.1 ± 0.2 (0.9 – 1.3) |
-1.1 | 0.3# | |
t- independent test
#
Mann Whitney –U test.