Prospective study of dietary protein intake and risk of hip fracture in postmenopausal women

Ronald G. Munger, James R Cerhan, B. C H Chiu

Research output: Contribution to journalArticle

276 Citations (Scopus)

Abstract

Background: The role of dietary protein intake in osteoporosis remains controversial. Protein is an important structural component of bone and protein supplementation improves the medical outcome of hip fracture patients, but it is unknown whether protein intake can reduce the incidence risk of hip fracture. Objective: The relation between intake of protein and other nutrients and subsequent incidence of hip fracture was evaluated. Design: Nutrient intake was assessed with a food-frequency questionnaire in a cohort of Iowa women aged 55-69 y at baseline in 1986. Incident hip fractures were ascertained through follow-up questionnaires mailed to participants in 1987 and 1989 and verified by physician reports. Results: Forty-four cases of incident hip fractures were included in the analyses of 104 338 person-years (the number of subjects studied times the number of years of follow-up) of follow-up data. The risk of hip fracture was not related to intake of calcium or vitamin D, but was negatively associated with total protein intake. Animal rather than vegetable sources of protein appeared to account for this association. In a multivariate model with inclusion of age, body size, parity, smoking, alcohol intake, estrogen use, and physical activity, the relative risks of hip fracture decreased across increasing quartiles of intake of animal protein as follows: 1.00 (reference), 0.59 (95% CI: 0.26, 1.34), 0.63 (0.28, 1.42), and 0.31 (0.10, 0.93); P for trend = 0.037. Conclusion: Intake of dietary protein, especially from animal sources, may be associated with a reduced incidence of hip fractures in postmenopausal women.

Original languageEnglish (US)
Pages (from-to)147-152
Number of pages6
JournalAmerican Journal of Clinical Nutrition
Volume69
Issue number1
StatePublished - Jan 1999

Fingerprint

hip fractures
Dietary Proteins
Hip Fractures
prospective studies
protein intake
dietary protein
Prospective Studies
Proteins
incidence
Food
Incidence
Vegetable Proteins
smoking (food products)
animal proteins
Inclusion Bodies
osteoporosis
protein supplements
food frequency questionnaires
Body Size
relative risk

Keywords

  • Aging
  • Diet
  • Epidemiology
  • Hip fractures
  • Nutrition
  • Osteoporosis
  • Postmenopausal women
  • Prospective studies
  • Protein intake

ASJC Scopus subject areas

  • Food Science
  • Medicine (miscellaneous)

Cite this

Prospective study of dietary protein intake and risk of hip fracture in postmenopausal women. / Munger, Ronald G.; Cerhan, James R; Chiu, B. C H.

In: American Journal of Clinical Nutrition, Vol. 69, No. 1, 01.1999, p. 147-152.

Research output: Contribution to journalArticle

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