Osteoporosis International

, Volume 23, Issue 4, pp 1391–1392

Erratum to: Ethnic differences in composite indices of femoral neck strength

  • S. Ishii
  • J. A. Cauley
  • G. A. Greendale
  • M. E. Danielson
  • N. Safaei Nili
  • A. Karlamangla
Erratum

DOI: 10.1007/s00198-011-1887-4

Cite this article as:
Ishii, S., Cauley, J.A., Greendale, G.A. et al. Osteoporos Int (2012) 23: 1391. doi:10.1007/s00198-011-1887-4
  • 237 Downloads

Erratum to: Osteoporos Int

DOI 10.1007/s00198-011-1723-x

The scale factors provided by Hologic, Inc. to compute femoral neck axis length (FNAL) from the midline endpoint coordinates were off by a factor of 2; thus absolute values reported in Tables 1–4 of the paper for FNAL, bending strength index (BSI), and impact strength index (ISI) were scaled incorrectly. Corrected absolute values for FNAL and ISI are 0.5 times the reported FNAL and ISI values, and corrected absolute values for BSI are 2 times the reported BSI values.

Thus, the FNAL rows in Tables 1 and 3 should be as shown below.
Table 1

Characteristics of study participants by ethnicity

Characteristics

All (n = 1940)

Caucasian (n = 968)

African-American (n = 512)

Chinese (n = 221)

Japanese (n = 239)

P

FNAL(cm)

8.95(0.5)

9.05(0.5)

9.00(0.55)

8.70(0.45)a

8.70(0.45)a

<0.001

Table 3

Characteristics of Chinese and Japanese participants by birth place

Characteristics

Chinese

Japanese

US born (n = 68)

Foreign born (n = 152)

P ab

US born (n = 124)

Foreign born (n = 110)

P ab

FNAL(cm)

8.80(0.45)

8.65(0.40)

0.34

8.65(0.45)

8.75(0.45)

1.0

The BSI and ISI cells in Tables 2 and 4 also need to be scaled by 2 and 0.5 respectively. For example, BSI in Caucasians (reference) in Table 2 (model 3) is 0.98; in US-born Chinese (reference) in Table 4 (model 3) is 1.14; and in US-born Japanese (reference) in Table 4 (model 3) is 1.24. Similarly, for example, ISI in Caucasians (reference) in Table 2 (model 3) is 0.18; in US-born Chinese (reference) in Table 4 (model 3) is 0.20; and in US-born Japanese (reference) in Table 4 (model 3) is 0.23.

Note that effect sizes (and confidence intervals) for BSI and ISI in tables 2 and 4 are also similarly scaled.

Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2012

Authors and Affiliations

  • S. Ishii
    • 1
  • J. A. Cauley
    • 3
  • G. A. Greendale
    • 2
  • M. E. Danielson
    • 3
  • N. Safaei Nili
    • 2
  • A. Karlamangla
    • 2
  1. 1.Geriatric Research, Education and Clinical Center (GRECC)VA Greater Los Angeles Healthcare SystemLos AngelesUSA
  2. 2.Department of Medicine/Division of GeriatricsDavid Geffen School of Medicine at UCLALos AngelesUSA
  3. 3.Department of Epidemiology, Graduate School of Public HealthUniversity of PittsburghPittsburghUSA

Personalised recommendations