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The Recent Prevalence of Osteoporosis and Low Bone Mass in the United States Based on Bone Mineral Density at the Femoral Neck or Lumbar Spine.

·J Bone Miner Res·2014·1,773 citations·General
Free Full Text·DOI·PubMed
SummaryAbstract on PubMed →

Wright et al. applied NHANES 2005–2010 DXA data to 2010 US Census counts to estimate how many Americans aged 50+ meet WHO criteria for osteoporosis or low bone mass. The study used both femoral neck and lumbar spine BMD — the first nationally representative US estimate to include both sites. Projections through 2030 quantify the growing burden driven by demographic aging alone.

Study Snapshot

Design
Cross-sectional epidemiologic study
Setting: Nationally representative US survey (NHANES mobile examination centers)
Funding: National Osteoporosis Foundation (UAB contract)
Objective
Whether applying NHANES 2005–2010 DXA prevalence data to Census counts yields updated US osteoporosis burden estimates.
Outcome(s)
Estimated number of US adults 50+ with osteoporosis or low bone mass in 2010
Subjects
99 million US adults aged 50+ (2010 Census); NHANES 2005–2010 DXA sample
Inclusion
  • Age 50 years and older
  • Non-institutionalized US civilian population
  • DXA measured at femoral neck and lumbar spine
Exclusion
  • Institutionalized individuals (NHANES exclusion)
  • Race/ethnicities other than NH-White, NH-Black, Mexican American (not reported separately)
Statistics
Direct standardizationComplex survey weightingCensus projection multiplication

Key Findings

  • Osteoporosis affected 10.3% of US adults over 50 in 2010 — approximately 10.2 million people. Combined with low bone mass (43.9% prevalence), a total of 53.6 million Americans (roughly 54% of the entire over-50 population) had compromised bone density at the femoral neck or lumbar spine.
  • Women carried the disproportionate burden: 8.2 million women (15.4%) vs. 2.0 million men (4.3%) had osteoporosis. A more than threefold difference in prevalence. Low bone mass showed a similar pattern: 27.3 million women vs. 16.1 million men.
  • Racial disparities in prevalence do not predict absolute case counts. Mexican Americans had the highest osteoporosis prevalence (13.4%), non-Hispanic Blacks the lowest (4.9%), yet non-Hispanic Whites accounted for 7.7 million of the 10.2 million total cases because of population size. This distinction between prevalence and count matters for understanding where clinical burden actually sits.
  • Measuring only the femoral neck (per WHO population-level guidance) underestimates the clinical burden: using femoral neck alone reduces the osteoporosis count by 54% compared to femoral neck plus lumbar spine. The NOF recommends both sites in clinical practice because the lumbar spine, being predominantly trabecular bone, detects spinal osteoporosis that warrants treatment to prevent vertebral fracture.
  • Adding the total hip (per ISCD guidance) to femoral neck and lumbar spine increased overall osteoporosis prevalence by only 0.4 percentage points. A statistically insignificant change with overlapping confidence intervals. In 86% of adults aged 50+, femoral neck T-scores were already lower than total hip T-scores, making the total hip largely redundant for population-level diagnosis.
  • Osteoporosis prevalence climbs steeply with age. Among women, it rises from 6.8% at ages 50–59 to 34.9% at age 80+. For men, it rises from 3.4% to 10.9% over the same range. Clinicians should treat advanced age as a major independent risk flag.
  • Demographic aging alone. With no change in underlying prevalence rates. Will increase the combined osteoporosis and low bone mass burden by 19% by 2020 and 32% by 2030, adding approximately 17.2 million more affected individuals over two decades.
Board PearlOsteoporosis and low bone mass affect 54% of US adults over 50 — using femoral neck alone misses 54% of osteoporosis cases captured by adding the lumbar spine.

Clinical Relevance

More than half your patients over age 50 have osteoporosis or low bone mass — and the majority are undiagnosed.

When you order a DXA, use both femoral neck and lumbar spine. Using femoral neck alone misses 54% of osteoporosis cases that the lumbar spine would catch, primarily because the spine's trabecular-rich architecture is more vulnerable to early bone loss. The NOF guidelines include both sites for exactly this reason: to identify patients at risk for vertebral fracture, which is the most common osteoporotic fracture and a known precursor to hip fracture.

Adding the total hip adds essentially nothing to your diagnostic yield. Skip it unless another indication exists.

For the boards and for practice: prevalence data from this paper means that any patient over 50 presenting with a fragility fracture or low-trauma injury should trigger a bone health evaluation, regardless of sex or race. Men are underscreened relative to their real burden (2 million with osteoporosis), and the 32% projected increase in affected individuals by 2030 means this problem is growing.

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|

The Recent Prevalence of Osteoporosis and Low Bone Mass in the United States Based on Bone Mineral Density at the Femoral Neck or Lumbar Spine.

·J Bone Miner Res·2014·1,773 citations·General
Free Full Text·DOI·PubMed
SummaryAbstract on PubMed →

Wright et al. applied NHANES 2005–2010 DXA data to 2010 US Census counts to estimate how many Americans aged 50+ meet WHO criteria for osteoporosis or low bone mass. The study used both femoral neck and lumbar spine BMD — the first nationally representative US estimate to include both sites. Projections through 2030 quantify the growing burden driven by demographic aging alone.

Study Snapshot

Design
Cross-sectional epidemiologic study
Setting: Nationally representative US survey (NHANES mobile examination centers)
Funding: National Osteoporosis Foundation (UAB contract)
Objective
Whether applying NHANES 2005–2010 DXA prevalence data to Census counts yields updated US osteoporosis burden estimates.
Outcome(s)
Estimated number of US adults 50+ with osteoporosis or low bone mass in 2010
Subjects
99 million US adults aged 50+ (2010 Census); NHANES 2005–2010 DXA sample
Inclusion
  • Age 50 years and older
  • Non-institutionalized US civilian population
  • DXA measured at femoral neck and lumbar spine
Exclusion
  • Institutionalized individuals (NHANES exclusion)
  • Race/ethnicities other than NH-White, NH-Black, Mexican American (not reported separately)
Statistics
Direct standardizationComplex survey weightingCensus projection multiplication

Key Findings

  • Osteoporosis affected 10.3% of US adults over 50 in 2010 — approximately 10.2 million people. Combined with low bone mass (43.9% prevalence), a total of 53.6 million Americans (roughly 54% of the entire over-50 population) had compromised bone density at the femoral neck or lumbar spine.
  • Women carried the disproportionate burden: 8.2 million women (15.4%) vs. 2.0 million men (4.3%) had osteoporosis. A more than threefold difference in prevalence. Low bone mass showed a similar pattern: 27.3 million women vs. 16.1 million men.
  • Racial disparities in prevalence do not predict absolute case counts. Mexican Americans had the highest osteoporosis prevalence (13.4%), non-Hispanic Blacks the lowest (4.9%), yet non-Hispanic Whites accounted for 7.7 million of the 10.2 million total cases because of population size. This distinction between prevalence and count matters for understanding where clinical burden actually sits.
  • Measuring only the femoral neck (per WHO population-level guidance) underestimates the clinical burden: using femoral neck alone reduces the osteoporosis count by 54% compared to femoral neck plus lumbar spine. The NOF recommends both sites in clinical practice because the lumbar spine, being predominantly trabecular bone, detects spinal osteoporosis that warrants treatment to prevent vertebral fracture.
  • Adding the total hip (per ISCD guidance) to femoral neck and lumbar spine increased overall osteoporosis prevalence by only 0.4 percentage points. A statistically insignificant change with overlapping confidence intervals. In 86% of adults aged 50+, femoral neck T-scores were already lower than total hip T-scores, making the total hip largely redundant for population-level diagnosis.
  • Osteoporosis prevalence climbs steeply with age. Among women, it rises from 6.8% at ages 50–59 to 34.9% at age 80+. For men, it rises from 3.4% to 10.9% over the same range. Clinicians should treat advanced age as a major independent risk flag.
  • Demographic aging alone. With no change in underlying prevalence rates. Will increase the combined osteoporosis and low bone mass burden by 19% by 2020 and 32% by 2030, adding approximately 17.2 million more affected individuals over two decades.
Board PearlOsteoporosis and low bone mass affect 54% of US adults over 50 — using femoral neck alone misses 54% of osteoporosis cases captured by adding the lumbar spine.

Clinical Relevance

More than half your patients over age 50 have osteoporosis or low bone mass — and the majority are undiagnosed.

When you order a DXA, use both femoral neck and lumbar spine. Using femoral neck alone misses 54% of osteoporosis cases that the lumbar spine would catch, primarily because the spine's trabecular-rich architecture is more vulnerable to early bone loss. The NOF guidelines include both sites for exactly this reason: to identify patients at risk for vertebral fracture, which is the most common osteoporotic fracture and a known precursor to hip fracture.

Adding the total hip adds essentially nothing to your diagnostic yield. Skip it unless another indication exists.

For the boards and for practice: prevalence data from this paper means that any patient over 50 presenting with a fragility fracture or low-trauma injury should trigger a bone health evaluation, regardless of sex or race. Men are underscreened relative to their real burden (2 million with osteoporosis), and the 32% projected increase in affected individuals by 2030 means this problem is growing.

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