a Biomechanics Research Laboratory, School of Medicine , University of Wollongong , Wollongong , Australia.
Ergonomics. 2018 Mar;61(3):464-472. doi: 10.1080/00140139.2017.1349936. Epub 2017 Jul 12.
This study investigated differences in standard measurements used to determine bra size, under-bust chest circumference (UBCC) and over-bust chest circumference (OBCC), measured from a three-dimensional scan (hand-held scanner) compared to the direct measurement in 111 women (age 21-56 years; right breast volume 57-1672 mL; bra size 10A-18G). Bland-Altman plots of UBCC measurements showed a large positive bias and wide limits of agreement (12 cm; -4.6 to 28 cm), which increased as band size increased but decreased when the breasts were digitally removed from the scan prior to the UBCC measurement. The difference in UBCC measurements determined from scans compared to direct measurement had a strong positive correlation with breast volume and breast ptotis. The OBCC measurements showed a small positive bias (2.4 cm; -3.4 to 8.4), consistent across the range of bra sizes. Bra band size measurements determined from three-dimensional scans can be inaccurate in women with large, ptotic breasts. Practitioner Summary: We investigated potential errors in anthropometric data derived from three-dimensional scans used for bra design and fit. Bra band size measurements taken from three-dimensional scans were over-estimated in women with large breasts, whereas bra cup size measurements were accurate to within one-cup size across the entire range of bra sizes.
本研究调查了用于确定胸罩尺寸的标准测量值之间的差异，即下胸围周长（UBCC）和上胸围周长（OBCC），通过三维扫描（手持扫描仪）测量与 111 名女性（年龄 21-56 岁；右乳房体积 57-1672 毫升；胸罩尺寸 10A-18G）的直接测量相比。UBCC 测量的 Bland-Altman 图显示出较大的正偏差和较宽的一致性区间（12 厘米；-4.6 至 28 厘米），随着胸罩尺寸的增加而增加，但在乳房在进行 UBCC 测量之前从扫描中数字去除时减小。与直接测量相比，从扫描中确定的 UBCC 测量值的差异与乳房体积和乳房突出度具有很强的正相关性。OBCC 测量值显示出较小的正偏差（2.4 厘米；-3.4 至 8.4），在胸罩尺寸范围内一致。对于大乳房、下垂的女性，从三维扫描中确定的胸罩带尺寸可能不准确。
