Why do women undergo total hip replacement more frequently than men?

Why Women Have More Hip Replacements Than Men

Women undergo hip replacement surgery more frequently than men primarily because they have a substantially higher burden of hip osteoporosis and osteoarthritis, with hip fracture rates 3-4.5 times higher than men in younger age groups, despite evidence suggesting significant underuse of the procedure in women relative to their actual need. 1, 2

The Epidemiological Reality

The relationship between sex and hip replacement is more complex than raw procedure numbers suggest:

Higher Disease Burden in Women

• Women have significantly higher rates of hip fractures and osteoarthritis - the ratio of hip fracture incidence between women and men is approximately 4.5:1 at ages 60-69 years, narrowing to 1.5:1 at ages 70-79 years 1
• Women experience worse symptoms and greater disability from hip and knee arthritis compared to men 2
• The prevalence of arthritis requiring potential hip replacement is nearly twice as high in women (age-adjusted odds ratio 1.76) 2

The Paradox of Underuse

Despite higher disease burden, women actually receive hip replacements at lower rates relative to their clinical need:

• Women are 22% less likely to have undergone arthroplasty compared to men when adjusting for disease severity (adjusted odds ratio 0.78) 2
• The potential need for hip arthroplasty is 44.9 per 1000 women versus 20.8 per 1000 men - more than double 2
• Women are significantly less likely to have even discussed arthroplasty with a physician (adjusted odds ratio 0.63), despite equal willingness to undergo surgery 2

Biological and Structural Factors

Bone Microarchitecture Differences

The pattern of bone loss differs fundamentally between sexes:

• Women lose trabecular connectivity with aging, while men experience trabecular thinning but maintain connectivity 1
• This differential bone loss pattern makes women more susceptible to fractures requiring eventual replacement
• Postmenopausal estrogen decline accelerates bone density loss by approximately 2% annually for the first 5 years, then 1% thereafter 3

Demographic Patterns

Historical data shows:

• Hip replacement rates are consistently higher in women across all age groups until very advanced age 4, 5
• Women have 3-6 times higher rates of primary hip replacement in Medicare populations 5
• The lifetime risk of hip replacement for women aged 20-29 increased from 8.49% to 10.30% over recent decades 6

Healthcare Access and Bias Issues

Critical barriers disproportionately affect women:

• Women prioritize household responsibilities over surgery and trial alternative treatments more extensively before considering surgery 7
• Women report age- and gender-based biases in their care, while men feel more encouraged to pursue surgical treatment 7
• Women experience more negative physician interactions and perceive less support for surgical intervention 7

Clinical Outcomes Considerations

Mortality Differences

Importantly, men face substantially higher mortality after hip fracture:

• Inpatient mortality: 10.2% in men vs 4.7% in women 1
• 1-year mortality: 37.5% in men vs 28.2% in women 1
• This elevated mortality risk in men may persist over 10 years 1

Postoperative Outcomes

• Women demonstrate better range of motion after hip replacement, with significantly greater hip flexion and internal rotation 8
• No significant differences exist in postoperative satisfaction or quality of life between sexes 8
• Complication rates are relatively similar, though women may have slightly longer hospital stays 9

The Bottom Line

Women undergo more hip replacements because they develop more hip disease requiring surgery, not because they receive excessive treatment. In fact, the evidence strongly suggests women are undertreated relative to their clinical need. The higher absolute numbers of hip replacements in women reflect the substantially higher prevalence of osteoporosis and osteoarthritis in the female population, compounded by postmenopausal bone loss. Healthcare providers should be aware that women face systematic barriers to accessing appropriate surgical care and may require more proactive discussion of surgical options when clinically indicated 2, 7.