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. 2014 Dec 29;65(630):e9–e15. doi: 10.3399/bjgp15X683101

Table 2.

Blood pressure at 90 days by adherence category as assessed using BAAS query

In the past 4 weeks, do you recall not having taken your antihypertensive medication sometimes?

N % Systolic blood pressure Diastolic blood pressure


Mean ± SD, mmHg P-value Mean ± SD, mmHg P-value
No 7008 74.6 135.6 ± 11.0 <0.001a 81.0 ± 7.0 <0.001a
Yes 2386 25.4 138.6 ± 12.0 a 83.0 ± 8.0 a
A 1003 10.7 137.1 ± 10.6 82.5 ± 7.0
B 847 9.0 137.9 ± 11.1 82.5 ± 7.5
C 315 3.4 141.1 ± 13.3 83.9 ± 8.4
D 191 2.0 144.9 ± 16.1 84.6 ± 9.0
E 30 0.3 148.9 ± 14.9 88.3 ± 8.0
a

Represents a comparison between adherent patients (those who answered ‘No’) and non-adherent patients (those who answered A: ‘Once in past 4 weeks’, B: ‘Once every 2 weeks’, C: ‘Once weekly’, D: ‘More than once/week but not daily’, or E: ‘Daily’). The adherent patients are classified in the ‘No’ category and non-adherent patients are grouped into the ‘Yes’ category.