Association of Low Birth Weight and Preterm Birth With the Incidence of Knee and Hip Arthroplasty for Osteoarthritis

Nov 4, 2014Arthritis care & research

Low birth weight and early birth linked to knee and hip replacement surgery for osteoarthritis

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Abstract

Low birth weight (LBW) is associated with a twofold increase in the risk of hip arthroplasty for osteoarthritis.

LBW is linked to a hazard ratio of 2.04 for hip arthroplasty, indicating a significant increase in risk.
Preterm birth is associated with a hazard ratio of 2.50 for hip arthroplasty, suggesting a heightened risk compared to those born at term.
No significant association was found between LBW or preterm birth and knee arthroplasty.
The associations remained after adjusting for factors like age, sex, and body mass index.
Further investigation is needed to understand the underlying mechanisms connecting LBW and preterm birth to hip arthroplasty.

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OBJECTIVE: Low birth weight (LBW) and preterm birth have been associated with adverse adult outcomes, including hypertension, insulin resistance, cardiovascular disease, and reduced bone mass. It is unknown whether LBW and preterm birth affect the risk of osteoarthritis (OA). This study aims to examine whether LBW and preterm birth were associated with the incidence of knee and hip arthroplasty for OA.

METHODS: A total of 3,604 participants of the Australian Diabetes, Obesity and Lifestyle Study who reported their birth weight and history of preterm birth and were age >40 years at the commencement of arthroplasty data collection comprised the study sample. The incidence of knee and hip replacement for OA during 2002-2011 was determined by linking cohort records to the Australian Orthopaedic Association National Joint Replacement Registry.

RESULTS: One hundred and sixteen participants underwent knee arthroplasty and 75 underwent hip arthroplasty for OA. LBW (yes versus no; hazard ratio [HR] 2.04, 95% confidence interval [95% CI] 1.11-3.75, P = 0.02) and preterm birth (yes versus no; HR 2.50, 95% CI 1.29-4.87, P = 0.007) were associated with increased incidence of hip arthroplasty independent of age, sex, body mass index, education level, hypertension, diabetes mellitus, smoking, and physical activity. No significant association was observed for knee arthroplasty.

CONCLUSION: Although these findings will need to be confirmed, they suggest that individuals born with LBW or at preterm are at increased risk of hip arthroplasty for OA in adult life. The underlying mechanisms warrant further investigation.

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Association of Low Birth Weight and Preterm Birth With the Incidence of Knee and Hip Arthroplasty for Osteoarthritis

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