Cherry Donald, Lucas Christine, Decker Sandra L
Centers for Disease Control and Prevention National Center for Health Statistics 3311 Toledo Road, Hyattsville, Maryland 20782, USA.
NCHS Data Brief. 2010 Aug(41):1-8.
From 1998 to 2008, the proportion of physician office-based visits in the United States became increasingly concentrated on those aged 45 and over. The intensity of physician office visits, as measured by medications prescribed or continued, imaging tests ordered or provided, and time spent with physicians, also became increasingly concentrated on those aged 45 and over. Although most physicians accept Medicare patients, acceptance of Medicare was higher among ophthalmologists and general surgeons than among general or family practitioners, internists, and psychiatrists. Over the past 30 years, the specialty concentration of visits has shifted significantly. In 1978, 62 percent of visits by patients aged 65 and over were to primary care physicians compared with 45 percent in 2008. The percentage of visits to physicians with a medical or surgical specialty increased from 37 percent to 55 percent.
从1998年到2008年，美国在医生办公室进行的就诊比例越来越集中于45岁及以上人群。以所开处方或续开药物、所安排或提供的影像检查以及与医生相处的时间来衡量，医生办公室就诊的强度也越来越集中于45岁及以上人群。尽管大多数医生接受医疗保险患者，但眼科医生和普通外科医生中接受医疗保险的比例高于普通或家庭医生、内科医生和精神科医生。在过去30年里，就诊的专科集中度发生了显著变化。1978年，65岁及以上患者中62%的就诊是去看初级保健医生，而2008年这一比例为45%。去看内科或外科专科医生的就诊比例从37%增至55%。
