Postmenopausal weight change and incidence of fracture: Post hoc findings from Women's Health Initiative Observational Study and Clinical Trials

Carolyn J. Crandall, Vedat O. Yildiz, Jean Wactawski-Wende, Karen Johnson, Zhao Chen, Scott B. Going, Nicole C. Wright, Jane A. Cauley

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Abstract

Objectives: To determine associations between postmenopausal change in body weight and incidence of fracture and associations between voluntary and involuntary weight loss and risk of fracture. Design: Post hoc analysis of data from the Women's Health Initiative Observational Study and Clinical Trials. Setting: 40 clinical centers in the United States. Participants: 120 566 postmenopausal women, aged 50-79 at baseline (1993-98), followed through 2013 (mean fracture follow-up duration 11 years from baseline). Exposures: Annualized percentage change in measured body weight from baseline to year 3, classified as stable (<5% change), weight loss (≥5%), or weight gain (≥5%). Self assessment of whether weight loss was intentional or unintentional. Cox proportional hazards regression models were adjusted for age, race/ethnicity, baseline body mass index (BMI), smoking, alcohol intake, level of physical activity, energy expenditure, calcium and vitamin D intake, physical function score, oophorectomy, hysterectomy, previous fracture, comorbidity score, and drug use. Main outcomes: Incident self reported fractures of the upper limbs, lower limbs, and central body; hip fractures confirmed by medical records. Results: Mean participant age was 63.3. Mean annualized percent weight change was 0.30% (95% confidence interval 0.28 to 0.32). Overall, 79 279 (65.6%) had stable weight; 18 266 (15.2%) lost weight; and 23 021 (19.0%) gained weight. Compared with stable weight, weight loss was associated with a 65% higher incidence rates of fracture in hip (adjusted hazard ratio 1.65, 95% confidence interval 1.49 to 1.82), upper limb (1.09, 1.03 to 1.16), and central body (1.30, 1.20 to 1.39); weight gain was associated with higher incidence rates of fracture in upper limb (1.10, 1.05 to 1.18) and lower limb (1.18, 1.12 to 1.25). Compared with stable weight, unintentional weight loss was associated with a 33% higher incidence rates of hip fracture (1.33, 1.19 to 1.47) and increased incidence rates of vertebral fracture (1.16, 1.06 to 1.26); intentional weight loss was associated with increased incidence rates of lower limb fracture (1.11, 1.05 to 1.17) and decreased incidence of hip fracture (0.85, 0.76 to 0.95). Conclusions: Weight gain, weight loss, and intentional weight loss are associated with increased incidence of fracture, but associations differ by fracture location. Clinicians should be aware of fracture patterns after weight gain and weight loss.

Original languageEnglish (US)
Article numberh25
JournalBMJ (Online)
Volume350
DOIs
StatePublished - Jan 27 2015

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Women's Health
Observational Studies
Weight Loss
Clinical Trials
Weights and Measures
Incidence
Hip Fractures
Weight Gain
Upper Extremity
Lower Extremity
Confidence Intervals
Body Weight Changes
Ego
Ovariectomy
Hysterectomy
Proportional Hazards Models
Vitamin D
Energy Metabolism
Medical Records
Comorbidity

All Science Journal Classification (ASJC) codes

  • Medicine(all)

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Postmenopausal weight change and incidence of fracture : Post hoc findings from Women's Health Initiative Observational Study and Clinical Trials. / Crandall, Carolyn J.; Yildiz, Vedat O.; Wactawski-Wende, Jean; Johnson, Karen; Chen, Zhao; Going, Scott B.; Wright, Nicole C.; Cauley, Jane A.

In: BMJ (Online), Vol. 350, h25, 27.01.2015.

Research output: Contribution to journalArticle

Crandall, Carolyn J. ; Yildiz, Vedat O. ; Wactawski-Wende, Jean ; Johnson, Karen ; Chen, Zhao ; Going, Scott B. ; Wright, Nicole C. ; Cauley, Jane A. / Postmenopausal weight change and incidence of fracture : Post hoc findings from Women's Health Initiative Observational Study and Clinical Trials. In: BMJ (Online). 2015 ; Vol. 350.
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title = "Postmenopausal weight change and incidence of fracture: Post hoc findings from Women's Health Initiative Observational Study and Clinical Trials",
abstract = "Objectives: To determine associations between postmenopausal change in body weight and incidence of fracture and associations between voluntary and involuntary weight loss and risk of fracture. Design: Post hoc analysis of data from the Women's Health Initiative Observational Study and Clinical Trials. Setting: 40 clinical centers in the United States. Participants: 120 566 postmenopausal women, aged 50-79 at baseline (1993-98), followed through 2013 (mean fracture follow-up duration 11 years from baseline). Exposures: Annualized percentage change in measured body weight from baseline to year 3, classified as stable (<5{\%} change), weight loss (≥5{\%}), or weight gain (≥5{\%}). Self assessment of whether weight loss was intentional or unintentional. Cox proportional hazards regression models were adjusted for age, race/ethnicity, baseline body mass index (BMI), smoking, alcohol intake, level of physical activity, energy expenditure, calcium and vitamin D intake, physical function score, oophorectomy, hysterectomy, previous fracture, comorbidity score, and drug use. Main outcomes: Incident self reported fractures of the upper limbs, lower limbs, and central body; hip fractures confirmed by medical records. Results: Mean participant age was 63.3. Mean annualized percent weight change was 0.30{\%} (95{\%} confidence interval 0.28 to 0.32). Overall, 79 279 (65.6{\%}) had stable weight; 18 266 (15.2{\%}) lost weight; and 23 021 (19.0{\%}) gained weight. Compared with stable weight, weight loss was associated with a 65{\%} higher incidence rates of fracture in hip (adjusted hazard ratio 1.65, 95{\%} confidence interval 1.49 to 1.82), upper limb (1.09, 1.03 to 1.16), and central body (1.30, 1.20 to 1.39); weight gain was associated with higher incidence rates of fracture in upper limb (1.10, 1.05 to 1.18) and lower limb (1.18, 1.12 to 1.25). Compared with stable weight, unintentional weight loss was associated with a 33{\%} higher incidence rates of hip fracture (1.33, 1.19 to 1.47) and increased incidence rates of vertebral fracture (1.16, 1.06 to 1.26); intentional weight loss was associated with increased incidence rates of lower limb fracture (1.11, 1.05 to 1.17) and decreased incidence of hip fracture (0.85, 0.76 to 0.95). Conclusions: Weight gain, weight loss, and intentional weight loss are associated with increased incidence of fracture, but associations differ by fracture location. Clinicians should be aware of fracture patterns after weight gain and weight loss.",
author = "Crandall, {Carolyn J.} and Yildiz, {Vedat O.} and Jean Wactawski-Wende and Karen Johnson and Zhao Chen and Going, {Scott B.} and Wright, {Nicole C.} and Cauley, {Jane A.}",
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T2 - Post hoc findings from Women's Health Initiative Observational Study and Clinical Trials

AU - Crandall, Carolyn J.

AU - Yildiz, Vedat O.

AU - Wactawski-Wende, Jean

AU - Johnson, Karen

AU - Chen, Zhao

AU - Going, Scott B.

AU - Wright, Nicole C.

AU - Cauley, Jane A.

PY - 2015/1/27

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N2 - Objectives: To determine associations between postmenopausal change in body weight and incidence of fracture and associations between voluntary and involuntary weight loss and risk of fracture. Design: Post hoc analysis of data from the Women's Health Initiative Observational Study and Clinical Trials. Setting: 40 clinical centers in the United States. Participants: 120 566 postmenopausal women, aged 50-79 at baseline (1993-98), followed through 2013 (mean fracture follow-up duration 11 years from baseline). Exposures: Annualized percentage change in measured body weight from baseline to year 3, classified as stable (<5% change), weight loss (≥5%), or weight gain (≥5%). Self assessment of whether weight loss was intentional or unintentional. Cox proportional hazards regression models were adjusted for age, race/ethnicity, baseline body mass index (BMI), smoking, alcohol intake, level of physical activity, energy expenditure, calcium and vitamin D intake, physical function score, oophorectomy, hysterectomy, previous fracture, comorbidity score, and drug use. Main outcomes: Incident self reported fractures of the upper limbs, lower limbs, and central body; hip fractures confirmed by medical records. Results: Mean participant age was 63.3. Mean annualized percent weight change was 0.30% (95% confidence interval 0.28 to 0.32). Overall, 79 279 (65.6%) had stable weight; 18 266 (15.2%) lost weight; and 23 021 (19.0%) gained weight. Compared with stable weight, weight loss was associated with a 65% higher incidence rates of fracture in hip (adjusted hazard ratio 1.65, 95% confidence interval 1.49 to 1.82), upper limb (1.09, 1.03 to 1.16), and central body (1.30, 1.20 to 1.39); weight gain was associated with higher incidence rates of fracture in upper limb (1.10, 1.05 to 1.18) and lower limb (1.18, 1.12 to 1.25). Compared with stable weight, unintentional weight loss was associated with a 33% higher incidence rates of hip fracture (1.33, 1.19 to 1.47) and increased incidence rates of vertebral fracture (1.16, 1.06 to 1.26); intentional weight loss was associated with increased incidence rates of lower limb fracture (1.11, 1.05 to 1.17) and decreased incidence of hip fracture (0.85, 0.76 to 0.95). Conclusions: Weight gain, weight loss, and intentional weight loss are associated with increased incidence of fracture, but associations differ by fracture location. Clinicians should be aware of fracture patterns after weight gain and weight loss.

AB - Objectives: To determine associations between postmenopausal change in body weight and incidence of fracture and associations between voluntary and involuntary weight loss and risk of fracture. Design: Post hoc analysis of data from the Women's Health Initiative Observational Study and Clinical Trials. Setting: 40 clinical centers in the United States. Participants: 120 566 postmenopausal women, aged 50-79 at baseline (1993-98), followed through 2013 (mean fracture follow-up duration 11 years from baseline). Exposures: Annualized percentage change in measured body weight from baseline to year 3, classified as stable (<5% change), weight loss (≥5%), or weight gain (≥5%). Self assessment of whether weight loss was intentional or unintentional. Cox proportional hazards regression models were adjusted for age, race/ethnicity, baseline body mass index (BMI), smoking, alcohol intake, level of physical activity, energy expenditure, calcium and vitamin D intake, physical function score, oophorectomy, hysterectomy, previous fracture, comorbidity score, and drug use. Main outcomes: Incident self reported fractures of the upper limbs, lower limbs, and central body; hip fractures confirmed by medical records. Results: Mean participant age was 63.3. Mean annualized percent weight change was 0.30% (95% confidence interval 0.28 to 0.32). Overall, 79 279 (65.6%) had stable weight; 18 266 (15.2%) lost weight; and 23 021 (19.0%) gained weight. Compared with stable weight, weight loss was associated with a 65% higher incidence rates of fracture in hip (adjusted hazard ratio 1.65, 95% confidence interval 1.49 to 1.82), upper limb (1.09, 1.03 to 1.16), and central body (1.30, 1.20 to 1.39); weight gain was associated with higher incidence rates of fracture in upper limb (1.10, 1.05 to 1.18) and lower limb (1.18, 1.12 to 1.25). Compared with stable weight, unintentional weight loss was associated with a 33% higher incidence rates of hip fracture (1.33, 1.19 to 1.47) and increased incidence rates of vertebral fracture (1.16, 1.06 to 1.26); intentional weight loss was associated with increased incidence rates of lower limb fracture (1.11, 1.05 to 1.17) and decreased incidence of hip fracture (0.85, 0.76 to 0.95). Conclusions: Weight gain, weight loss, and intentional weight loss are associated with increased incidence of fracture, but associations differ by fracture location. Clinicians should be aware of fracture patterns after weight gain and weight loss.

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