Table 4: Analysis of inter-arm blood pressure difference and blood pressure by classification.

Covariates IAD Mean Change Statistical Test P-Value
< 10 ≥ 10
Hypertension Category (Using Averaged Measurement)
Normal 147 17 Fisher's Exact test 0.02
Stage I Hypertension* 35 11
Stage II Hypertensive** 5 2
Hypertension Category (Using Lowest Measurement)
Normal 159 26 Fisher's Exact test 1
Stage I Hypertension* 24 4
Stage II Hypertensive** 4 0
Hypertension Category (Using Highest Measurement)
Normal 115 9 Chi-sq test < 0.001
Stage I Hypertension* 53 10
Stage II Hypertensive** 19 11

*Stage I hypertension: 120/80 to 139/89;**Stage II hypertension: 140/90 to 159/99.