Table 4 Factors associated with the false negative results of echocardiographic results
Variable | Category | Number | Inconsistence(%) | Univariate analysis | Multivariate analysis | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
P | OR | 95%CI | P | OR | 95%CI | ||||||
lower | upper | lower | upper | ||||||||
Previous cardiovascular conditions or cardiac diseases | |||||||||||
Congenital heart disease | yes | 42 | 11 (26.2) | 0.008 | 3.194 | 1.322 | 7.715 | 0.038 | 2.907 | 1.062 | 7.956 |
no | 140 | 14 (10.0) | |||||||||
Degenerative cardiac valve disease | yes | 18 | 3 (16.7) | 0.984 | 1.291 | 0.645 | 4.825 | ||||
no | 164 | 22 (13.4) | |||||||||
Rheumatic heart disease | yes | 41 | 9 (22.0) | 0.083 | 2.197 | 0.890 | 5.428 | 0.080 | |||
no | 141 | 16 (11.3) | |||||||||
Clinical features | |||||||||||
Fever | yes | 141 | 15 (10.6) | 0.024 | 0.369 | 0.151 | 0.900 | 0.028 | 0.309 | 0.108 | 0.882 |
no | 41 | 10 (24.4) | |||||||||
Heart murmurs | yes | 162 | 18 (11.1) | 0.010 | 0.232 | 0.082 | 0.658 | 0.003 | 0.165 | 0.050 | 0.546 |
no | 20 | 7 (35.0) | |||||||||
Embolism | yes | 40 | 8 (20.0) | 0.193 | 1.838 | 0.728 | 4.639 | ||||
no | 142 | 17 (12.0) | |||||||||
Positive blood culture results | yes | 94 | 10 (10.6) | 0.21 | 0.579 | 0.245 | 1.368 | ||||
no | 88 | 15 (17.0) | |||||||||
Size of vegetations | < 1 cm | 32 | 12 (37.5) | 0.000 | 6.330 | 2.532 | 15.873 | 0.000 | 8.197 | 2.841 | 23.256 |
> 1 cm | 150 | 13 (8.7) | |||||||||