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Bone Turnover Marker Profiling and Fracture Risk in Older Women: Fracture Risk from Age 75 to 90.

Ivaska Kaisa K; Gerdhem Paul; McGuigan Fiona E; Malmgren Linnea; Kanis John A; Akesson Kristina E; Johansson Helena

Bone Turnover Marker Profiling and Fracture Risk in Older Women: Fracture Risk from Age 75 to 90.

Ivaska Kaisa K
Gerdhem Paul
McGuigan Fiona E
Malmgren Linnea
Kanis John A
Akesson Kristina E
Johansson Helena
Katso/Avaa
Ivaska2022_Article_BoneTurnoverMarkerProfilingAnd.pdf (1.345Mb)
Lataukset: 

doi:10.1007/s00223-022-00996-8
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Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2022081153823
Tiivistelmä

Purpose: A major challenge in osteoporosis is to identify individuals at high fracture risk. We investigated six bone turnover markers (BTMs) to determine association with specific fracture types; the time-frame for risk prediction and whether these are influenced by age at assessment.

Methods: Population-based OPRA cohort (n = 1044) was assessed at ages 75, 80, 85 and fractures documented for up to 15 years. Six BTMs were analyzed at each time-point (N-terminal propeptide of type I collagen, PINP; total osteocalcin, OC; bone-specific alkaline phosphatase, BALP; C-terminal telopeptide of type I collagen, CTX; tartrate-resistant acid phosphatase 5b, TRAcP5b; urinary osteocalcin). Hazard ratios (HR) for any, major osteoporotic, vertebral and hip fractures were calculated as short (1, 2, 3 years) and long-term risk (5, 10, 15 years).

Results: At 75 year, high CTX levels were associated with an increased risk of all fractures, including major osteoporotic fractures, across most time-frames (HRs ranging: 1.28 to 2.28). PINP was not consistently associated. Urinary osteocalcin was consistently associated with elevated short-term risk (HRs ranging: 1.83-2.72). Other BTMs were directionally in accordance, though not all statistically significant. BTMs were not predictive for hip fractures. Association of all BTMs attenuated over time; at 80 year none were associated with an increased fracture risk.

Conclusion: CTX, urinary OC and TRAcP5b are predictive for fracture in a 1 to 3 year, perspective, whereas in the long-term or above age 80 years, BTMs appear less valuable. Resorption markers, particularly CTX, were more consistently associated with fracture risk than formation markers in the very elderly.

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