Table 3.
Variance components for short-term repeatability measurements of systolic and pulse pressure (n of observations = 316)a
| R Brachial SBP-sitting | Central SBP-supine | R Brachial SBP-supine | L Brachial SBP-supine | R Ankle SBP-supine | L Ankle SBP-supine | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Source of variation | SDb | %c | SD | % | SD | % | SD | % | SD | % | SD | % |
| Between-participants | 14.3 | 63 | 17.8 | 62 | 13.4 | 63 | 13.5 | 66 | 19.7 | 65 | 19.4 | 69 |
| Between-visits | 9.5 | 28 | 10.6 | 22 | 8.6 | 28 | 8.2 | 24 | 11.8 | 23 | 10.7 | 21 |
| Within-visit | 5.3 | 9 | 9.3 | 17 | 5.0 | 9 | 5.2 | 10 | 8.6 | 12 | 7.3 | 10 |
| Total | 18.0 | 22.7 | 16.7 | 16.6 | 24.5 | 23.3 | ||||||
| R Brachial PP-sitting | Central PP-supine | R Brachial PP-supine | L Brachial PP-supine | R Ankle PP-supine | L Ankle PP-supine | |||||||
| Between-participants | 13.5 | 73 | 16.1 | 66 | 9.7 | 67 | 10.1 | 71 | 17.1 | 68 | 16.6 | 71 |
| Between-visits | 6.8 | 18 | 8.6 | 19 | 5.0 | 18 | 4.9 | 16 | 8.9 | 18 | 7.3 | 14 |
| Within-visit | 4.7 | 9 | 7.9 | 16 | 4.6 | 15 | 4.3 | 13 | 7.6 | 14 | 7.8 | 15 |
| Total | 15.8 | 19.9 | 11.8 | 12.0 | 20.8 | 19.8 | ||||||
a n of observations was obtained from 2 series of paired measurements over 4–8 weeks on the same participants (79 × 2 × 2 = 316).
bVariance component estimate was expressed as SD.
dPercentage of variation; percentages were rounded to the nearest whole number.
eR = right; L = left; SBP = systolic blood pressure; PP = pulse pressure.