Variable | Current user Mean ± SD | Past user Mean ± SD | Non-user Mean ± SD |
---|---|---|---|
RA Area (cm) | 19 ± 4a | 17 ± 3 | 15 ± 3 |
RA Area Index (cm2 m−2) | 8 ± 1 | 8 ± 2 | 12 ± 18 |
RA reservoir strain (%) | 36 ± 10a | 43 ± 14 | 44 ± 13 |
RA conduit strain (%) | 25 ± 8a | 31 ± 14 | 33 ± 10 |
RA booster strain (%) | 12 ± 5 | 13 ± 6 | 13 ± 5 |