Table 4.

Distribution of maximum change of systolic blood pressure during surgery

	Number of cases
0 ~ 9 mmHg	12	60~69 mmHg	2
10 ~ 19 mmHg	25	70 ~ 79 mmHg	3
20 ~ 29 mmHg	30	80 ~ 89 mmHg	2
30 ~ 39 mmHg	26	90 mmHg~	2
40 ~ 49 mmHg	11	Total	120
50 ~ 59 mmHg	7