Table 1

Mean (SE) blood pressure1-150 by apnoea/hypopnoea index (AHI) category in participants in the Wisconsin Sleep Cohort Study

Blood pressure (mm Hg)AHI
<5, not habitual snorer<5, habitual snorer5–15>15
Standard, in-laboratory (n=708)
 Early evening
  Systolic121.9  (0.7)125.6  (0.8)1-160 124.8  (1.3)1-160 127.1  (1.7)1-160
  Diastolic80.1 (0.5)82.0 (0.6)1-160 82.2 (0.9)1-160 82.9 (1.2)1-160
 Morning
  Systolic119.8 (0.8)122.9 (0.9)1-160 123.4 (1.4)1-160 125.2 (1.9)1-160
  Diastolic81.4 (0.6)82.1 (0.6)83.5 (0.9)83.3 (1.3)
Ambulatory (n=551)
 Average during wake
  Systolic122.7 (0.7)124.0 (0.9)127.5 (1.2)1-160 127.6 (1.8)1-160
  Diastolic75.5 (0.5)75.4 (0.6)77.8 (0.8)1-160 78.2 (1.0)1-160
 Average during sleep
  Systolic104.2 (0.7)104.8 (0.9)108.2 (1.2)1-160 108.9 (1.9)1-160
  Diastolic61.1 (0.8)60.3 (0.6)62.7 (0.8)1-160 62.8 (1.3)1-160

  • ↵1-150 Adjusted for age, sex, body mass index; users of antihypertensive drugs were excluded.

  • ↵1-160 p<0.05 for difference in means compared with AHI <5.