Device | Mean area (mm2) or height (mm) of blood collected | Sd | Mean area (mm2) or height (mm) of pipetted standard blood volumes (n = 20) | sd | P valuea (one-tailed) |
---|---|---|---|---|---|
Straw (n = 56) | 27.50 | 18.51 | 14.69 | 3.32 | P < 0.05 |
Loop (n = 56) | 25.27 | 10.74 | P < 0.05 | ||
Plastic Pipette (n = 56) | 14.66 | 12.97 | 25.84 | 6.01 | P < 0.05 |
Glass Capillary Tubeb (n = 44) | 3.35c | 1.76 | 4.75c | 0.34 | P < 0.05 |