Table 2.

Prevalence of hypertension as determined by casual and 24 hour blood pressure measurement in the total group and in the group with no evidence of residual arch obstruction, and the sensitivity and specificity of increased casual systolic blood pressure in detecting increased 24 hour SBP

	Normal 24 < SBP	High 24 < SBP	Sensitivity	Specificity
Total group (n=119)
Normal casual SBP	73	12
High casual SBP	10	24	66%	88%
Total	83	36
No residual arch obstruction
Normal casual SBP	49	6
High casual SBP	8	7	54%
Total	57	13