Determinants of parathyroid hormone levels in nursing home residents.

Introduction: Elevated parathyroid hormone (PTH) levels contribute to age-related bone loss. Practitioners should be aware of iatrogenic and/or correctable determinants of PTH elevation.

Methods: We performed a cross-sectional study including 302 of 609 eligible residents at a state veterans home.

Determinants of vitamin D levels in nursing home residents.

Objective: To determine the effect of various doses of vitamin D(2) and D(3), as well as ambulatory status (a surrogate for sun exposure), on 25-OH-D levels.

Design: Cross-sectional study with multiple regression analysis.

Setting: A state veterans home for veterans and their spouses.

Between-meal risedronate does not alter bone turnover in nursing home residents.

Objectives: To assess the effect of between-meal weekly risedronate and daily calcium 630 mg and vitamin D 400 IU on bone turnover markers.

Design: Randomized,double-blind,placebo-controlled trial.

Setting: Skilled nursing home (NH).