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Table 5 Association of low V LF and osteoporotic femoral neck BMD with hip fractures that occurred during different follow-up periods

From: Association between low-frequency ultrasound and hip fractures - comparison with DXA-based BMD

  Hip Fx 1997-2006 Hip Fx 2006-2010 Hip Fx 1997-2010
NF n = 409, Hip Fx n = 9 NF n = 429, Hip Fx n = 11 NF n = 334, Hip Fx n = 19*
  n OR (95% CI) p n HR (95% CI) p n OR (95% CI) p
VLF Moderate or high (25-100%) 313    324    260   
Low (0-25%) 105 6.3 (1.5 - 25.5) 0.010 116 1.7 (0.5 - 5.7) 0.415 93 3.3 (1.3 - 8.4) 0.012
Femoral neck BMD T-score > -2.5 311    325    267   
  T-score ≤ -2.5 107 1.5 (0.4 - 6.0) 0.593 115 4.8 (1.4 - 16.6) 0.013 86 4.1 (1.6 – 10.5) 0.003
  1. All regression models were adjusted by age and BMI. In Cox regression previous fracture (during 1997–2006) was also used as a covariate. NF = non-fractured group, Hip Fx = hip fracture group, n = number of subjects, OR = odds ratio of logistic regression, HR = hazard ratio of Cox regression, CI = confidence interval, p = p-value of the covariate in the model. *Subjects who died during the follow-up were excluded (NF n = 26, Hip Fx n = 1).