I am a medical researcher with little physics background but currently completing a study of the physical characteristics of arteries. I am trying to compare the stress-strain curve from my study with that of other studies. The problems are 1) the dimensions of the arteries in these other studies are slightly different from mine and 2) the methodology is different. Can the stress-strain curves be compared? Does the calculation of stress (in KPa) and strain (dimensionless) take these differences into account such that these curves are comparable? To elaborate: I derived a S-S curve by circumferential stretch of a 1cm segment of 5mm diameter tube. The comparable study took a 10cm segment of 4mm diameter tube, tied off the one end and subjected it to increasing fluid pressure. Is it reasonable to compare the S-S curves (and Young's moduli) derived from these 2 studies and make a general statement of how these 2 materials differ or are similar?