|
ECG abnormalities
|
All participants, No. (percentage)
|
Men (n = 13,983)
|
Women (n = 20,982)
|
P value# (men vs women)
|
|---|
|
20-44y
|
45-59y
|
≥60y
|
All ages
|
20-44y
|
45-59y
|
≥60y
|
All ages
|
|---|
|
ST depression and T abnormalities
|
4192 (10.96%)
|
5.26%
|
9.30%***
|
11.44%***
|
7.54%
|
8.36%
|
18.46%***
|
25.19%***
|
14.32%
|
< 0.001
|
|
Q wave abnormalities
|
416 (1.28%)
|
1.35%
|
1.77%
|
1.86%
|
1.55%
|
0.78%
|
1.23%
|
1.31%
|
1.00%
|
0.003
|
|
Q wave abnormalities plus ST-T ischemic abnormalities
|
75 (0.16%)
|
0.14%
|
0.05%
|
0.55%
|
0.19%
|
0.07%
|
0.17%
|
0.30%*
|
0.14%
|
0.414
|
|
ST elevation
|
239 (0.92%)
|
2.81%
|
0.88%***
|
0.20%***
|
1.78%
|
0.06%
|
0.16%
|
0.02%
|
0.08%
|
< 0.001
|
|
Tall R wave left
|
1042 (4.42%)
|
4.94%
|
7.16%*
|
6.28%
|
5.83%
|
1.21%
|
3.40%***
|
7.89%***
|
3.05%
|
< 0.001
|
|
Tall R wave right
|
54 (0.22%)
|
0.23%
|
0.13%
|
0.41%
|
0.23%
|
0.28%
|
0.06%
|
0.22%
|
0.20%
|
0.765
|
|
Left/right atrial hypertrophy
|
64 (0.31%)
|
0.21%
|
0.43%
|
1.05%
|
0.43%
|
0.06%
|
0.27%*
|
0.52%*
|
0.21%
|
0.063
|
|
Left axis deviation
|
698 (2.13%)
|
1.41%
|
3.31%***
|
4.36%***
|
2.48%
|
0.98%
|
2.22%***
|
3.35%***
|
1.78%
|
0.003
|
|
Right axis deviation
|
254 (0.67%)
|
0.99%
|
0.72%
|
0.80%
|
0.88%
|
0.67%
|
0.31%*
|
0.15%***
|
0.47%
|
0.008
|
|
Low voltage
|
325 (0.97%)
|
0.45%
|
0.81%
|
1.16%
|
0.68%
|
1.14%
|
1.18%
|
1.67%
|
1.24%
|
0.001
|
- The percentages shown above were compared by Chi-square or Fisher’s test. *, * and *** indicated the p values comparing the percentages of ECG findings in the middle/older age group with those in the young age group (* p < 0.05, ** p < 0.01, *** p < 0.001). # The p values revealed the differences comparing the percentages of ECG findings between men and women. The underlined p values indicated the significant differences (p < 0.05)
