Research Article
Clinical Manifestations of Ultrasonic Virtual Reality in the Diagnosis and Treatment of Cardiovascular Diseases
Table 5
The average value and standard deviation of some important indicators in the hypertension survey data of the surveyed patients.
| Index | Mathematical expectation | Variance | Covariance | Standard deviation |
| Age | 41.43 | 1.93 | 2.22 | 2.01 | Gender | 1.53 | 2.15 | 1.88 | 2.02 | Smokes | 1.63 | 1.92 | 2.21 | 2.05 | Annual family income | 3.66 | 1.82 | 2.01 | 2.43 | Excessive alcohol intake | 1.69 | 2.16 | 2.48 | 1.81 | BMI | 22.14 | 2.29 | 1.93 | 2.48 | Family history of hypertension | 1.13 | 1.8 | 1.98 | 2.34 | Lack of physical exercise | 1.98 | 2.47 | 2.32 | 2.31 | Marital status | 1.34 | 2.35 | 2.14 | 2.06 | Education level | 2.36 | 3.14 | 2.39 | 2.01 |
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