Potter J F, Elahi D, Tobin J D, Andres R
J Am Geriatr Soc. 1982 Jun;30(6):404-9. doi: 10.1111/j.1532-5415.1982.tb02841.x.
The potential usefulness of chest radiographs in the assessment of physical dimensions was examined in 243 men (age range 20-95 years) who had been followed up for an average of 12.3 years. From 1,124 of these films, measurements of cardiac diameter (CD) and thoracic diameter (TD) were made, and the cardiothoracic ratio (CTR) was calculated. Cross-sectional age differences were associated with a tendency toward increases in the CD and CTR throughout the lifespans of the 243 men, regardless of the presence or absence of heart disease. The thoracic diameter (TD) was greater in middle-aged than in young subjects, but less in the oldest than in the middle-aged subjects. Cumulative percentage curves for the CTR showed a shift to higher fiftieth to ninetieth percentile values with age. However, among the subjects free of heart disease, only one (age 95) had a CTR exceeding 50 per cent. Longitudinal analysis data agreed with the cross-sectional data. Forty-nine deceased subjects were matched with living subjects of the same heart disease classifications. Increases in the CD and CTR were predictive of death in the group with heart disease but not in the group without identifiable heart disease. An increase in CD was not correlated with an increase in systolic blood pressure. The decline in TD appeared to reflect a decline in rib-cage mobility with aging.
对243名男性（年龄范围20 - 95岁）进行了胸部X光片在身体尺寸评估方面潜在用途的研究，这些男性平均随访了12.3年。从其中1124张X光片中测量了心脏直径（CD）和胸廓直径（TD），并计算了心胸比率（CTR）。横断面年龄差异与这243名男性一生中CD和CTR呈增加趋势相关，无论是否患有心脏病。中年受试者的胸廓直径（TD）大于年轻受试者，但最年长者的胸廓直径小于中年受试者。CTR的累积百分比曲线显示，随着年龄增长，第五十至九十分位数的值向更高值偏移。然而，在无心脏病的受试者中，只有一名（95岁）的CTR超过50%。纵向分析数据与横断面数据一致。49名已故受试者与患有相同心脏病分类的在世受试者进行了匹配。在患有心脏病的组中，CD和CTR的增加可预测死亡，但在无明确心脏病的组中则不然。CD的增加与收缩压的增加无关。TD的下降似乎反映了随着年龄增长胸廓活动度的下降。
