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Table 2 Spearman correlation coefficients (r) for associations of quantitative ultrasound measures and continuous variables in the study

From: Menstrual irregularity and bone mass in premenopausal women: Cross-sectional associations with testosterone and SHBG

Characteristics BUA SOS QUI
  r P r P r P
Anthropometrics       
Body mass index 0.17 < 0.01 -0.01 0.79 0.05 0.35
Waist circumference 0.17 < 0.01 -0.01 0.86 0.05 0.32
Waist-hip-ratio 0.14 0.01 0.03 0.57 0.07 0.16
Hormonal factors       
Testosterone 0.14 0.01 0.09 0.08 0.11 0.04
SHBG -0.16 < 0.01 -0.14 0.01 -0.16 < 0.01
Free androgen index 0.21 < 0.001 0.16 < 0.01 0.19 < 0.001
  1. SHBG = sex hormone-binding globulin. BUA = broadband ultrasound attenuation. SOS = speed of sound. QUI = quantitative ultrasound index. Bold denotes significant association (P < 0.05).