Situation of studying IMT changes and FMD in contry and abroad by Doppler ultrasound Study on Frequency and risk factors related to femoral atherosclerosis among older women in the UK Leng GC et al. (2000) conducted a survey on 367 menopausal women aged 56 - 77 noted that two-thirds of the women who participated in the study had femoral atherosclerosis plaque.