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Christensen ER, Clausen A, Petersen TG, Skjødt MK, Abrahamsen B, Möller S, Rubin KH. Excess mortality following a first and subsequent osteoporotic fracture: a Danish nationwide register-based cohort study on the mediating effects of comorbidities. RMD Open 2023; 9:e003524. [PMID: 38030232 PMCID: PMC10689412 DOI: 10.1136/rmdopen-2023-003524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 11/05/2023] [Indexed: 12/01/2023] Open
Abstract
OBJECTIVES This study aimed to examine the risk of mortality following incident and subsequent osteoporotic fractures, the effect of different fracture type combinations, and the mediating role of postfracture morbidity in a Danish population. METHODS We used the National Patient Registry to identify patients ≥60 years with incident major osteoporotic fracture of the hip, vertebrae, wrist or humerus between 2013 and 2018, and controls matched 1:10 on age and sex. Possible mediators were identified using International Classification of Diseases, 10th Revision codes registered in the 6 months following index fracture. HRs were estimated using Cox regression analyses with 95% CIs. The effect of possible mediators was estimated using mediation analyses. RESULTS The study included 106 303 patients and 1 062 988 controls. Mortality following index fracture was highest in the month following hip fractures (HR 10.98 (95% CI 10.23 to 11.79) in women and HR 16.40 (95% CI 15.00 to 17.93) in men). Subsequent hip fractures resulted in the highest HRs for all fracture type combinations. In women, the highest HR was observed in patients with index wrist/subsequent hip fractures (HR 2.43 (95% CI 2.12 to 2.78)). In men, the highest HR was observed in patients with index humerus/subsequent hip fractures (HR 2.69 (95% CI 2.04 to 3.54)). Pneumonia mediated the largest proportion of mortality, but dehydration, urinary tract infection and sepsis were also important factors. CONCLUSIONS The highest mortality risk was found in the month immediately following both index and subsequent fracture. The combination of index and subsequent fractures at different skeletal sites had a substantial impact on the risk of mortality. Postfracture morbidities were found mediate the association.
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Affiliation(s)
| | - Anne Clausen
- OPEN - Open Patient data Explorative Network, Odense University Hospital, Odense, Denmark
- Research Unit OPEN, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Tanja Gram Petersen
- OPEN - Open Patient data Explorative Network, Odense University Hospital, Odense, Denmark
- Research Unit OPEN, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Michael Kriegbaum Skjødt
- Department of Medicine, Holbæk Hospital, Holbæk, Region Zealand, Denmark
- Department of Medicine, Gentofte Hospital, Hellerup, Copenhagen, Denmark
| | - Bo Abrahamsen
- Research Unit OPEN, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Medicine, Holbæk Hospital, Holbæk, Region Zealand, Denmark
| | - Sören Möller
- Research Unit OPEN, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Katrine Hass Rubin
- Research Unit OPEN, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
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Whitney DG, Erickson SR, Berri M. Risk of post-fracture pneumonia and its association with cardiovascular events and mortality in adults with intellectual disabilities. Front Psychiatry 2023; 14:1208887. [PMID: 38025418 PMCID: PMC10654739 DOI: 10.3389/fpsyt.2023.1208887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 10/10/2023] [Indexed: 12/01/2023] Open
Abstract
Objective Fragility fractures are associated with an increased risk of pneumonia, which is a leading cause of death in adults with intellectual disabilities; however, the timing and complications of post-fracture pneumonia are underinvestigated. The objectives of this study were to determine the 30-day pneumonia rate post-fracture and the association of post-fracture pneumonia with mortality and cardiovascular events among adults with intellectual disabilities. Methods This retrospective cohort study was conducted using Medicare and commercial claims from 01 January 2011 to 31 December 2016. Incidence of pneumonia 30 days after a fragility fracture among adults ≥18 years old with intellectual disabilities (Fx cohort) was compared to the incidence among matched adults with intellectual disabilities without fractures (w/oFx cohort) and the general population of patients with an incident fragility fracture (GP+Fx). For the Fx cohort, Cox regression was used to examine the adjusted association of time-varying pneumonia (within 30 days post-fracture) with mortality and incidence of cardiovascular events 0-30, 31-365, and 366-730 days post-fracture. Results There was a high-early rate of pneumonia within 30 days post-fracture for young, middle-aged, and elderly adults with intellectual disabilities (n = 6,183); this rate was 2.2- to 6.1-fold higher than the rate among the w/oFx (n = 12,366) and GP+Fx (n = 363,995) cohorts (all P < 0.05). For the Fx cohort, post-fracture 30-day incidence of pneumonia was associated with an increased 30-day rate of mortality (adjusted HR [aHR] = 5.19; 95% confidence interval [CI] = 3.68-7.32), heart failure (aHR = 2.96; 95% CI = 1.92-4.56), and cerebrovascular disease (aHF = 1.48; 95% CI = 0.93-2.35; P = 0.098), with sustained effects to 1 year for heart failure (aHR = 1.61; 95% CI = 1.19-2.17) and 2 years for mortality (aHR = 1.39; 95% CI = 1.06-1.83), and without evidence of effect modification by age. Discussion Adults with intellectual disabilities are vulnerable to post-fracture pneumonia within 30 days, and complications arising from this, across the adult lifespan, and not only during the elderly years.
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Affiliation(s)
- Daniel G. Whitney
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, United States
- Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, MI, United States
| | - Steven R. Erickson
- Department of Clinical Pharmacy, University of Michigan, Ann Arbor, MI, United States
| | - Maryam Berri
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, United States
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Whitney DG, Caird MS, Raggio CL, Hurvitz EA, Clines GA, Jepsen KJ. Perspective: A multi-trait integrative approach to understanding the structural basis of bone fragility for pediatric conditions associated with abnormal bone development. Bone 2023; 175:116855. [PMID: 37481149 DOI: 10.1016/j.bone.2023.116855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/16/2023] [Accepted: 07/19/2023] [Indexed: 07/24/2023]
Abstract
Bone development is a highly orchestrated process that establishes the structural basis of bone strength during growth and functionality across the lifespan. This developmental process is generally robust in establishing mechanical function, being adaptable to many genetic and environmental factors. However, not all factors can be fully accommodated, leading to abnormal bone development and lower bone strength. This can give rise to early-onset bone fragility that negatively impacts bone strength across the lifespan. Current guidelines for assessing bone strength include measuring bone mineral density, but this does not capture the structural details responsible for whole bone strength in abnormally developing bones that would be needed to inform clinicians on how and when to treat to improve bone strength. The clinical consequence of not operationalizing how altered bone development informs decision making includes under-detection and missed opportunities for early intervention, as well as a false positive diagnosis of fragility with possible resultant clinical actions that may actually harm the growing skeleton. In this Perspective, we emphasize the need for a multi-trait, integrative approach to better understand the structural basis of bone growth for pediatric conditions with abnormal bone development. We provide evidence to showcase how this approach might reveal multiple, unique ways in which bone fragility develops across and within an array of pediatric conditions that are associated with abnormal bone development. This Perspective advocates for the development of new translational research aimed at informing better ways to optimize bone growth, prevent fragility fractures, and monitor and treat bone fragility based on the child's skeletal needs.
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Affiliation(s)
- Daniel G Whitney
- Department of Physical Medicine and Rehabilitation, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA; Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, MI, USA.
| | - Michelle S Caird
- Department of Orthopaedic Surgery, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
| | | | - Edward A Hurvitz
- Department of Physical Medicine and Rehabilitation, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Gregory A Clines
- Division of Metabolism, Endocrinology & Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA; Endocrinology Section, Ann Arbor VA Medical Center, Ann Arbor, MI, USA
| | - Karl J Jepsen
- Department of Orthopaedic Surgery, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
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Whitney DG, Xu T, Whibley D, Erickson SR. High cardiorespiratory disease burden following a fracture among adults with intellectual disabilities. Bone 2023; 172:116784. [PMID: 37121558 PMCID: PMC10360920 DOI: 10.1016/j.bone.2023.116784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/12/2023] [Accepted: 04/25/2023] [Indexed: 05/02/2023]
Abstract
BACKGROUND Adults with intellectual disabilities have a greater risk for fragility fractures that begin to accumulate early in the adult lifespan, which may contribute to accelerated health declines. The objective was to determine if fragility fractures were associated with an increased 2-year rate of cardiorespiratory diseases among adults with intellectual disabilities. METHOD This retrospective cohort study used nationwide administrative claims data from 01/01/2011-12/31/2016 from the Medicare fee-for-service database. 2-year incidence of cardiorespiratory diseases were compared between adults ≥18 years old with intellectual disabilities with (n = 6183) vs. without (n = 67,842) an incident fragility fracture after confounder adjustment using Cox regression. RESULTS Fracture at the vertebral column, hip, non-proximal femur, tibia/fibula, and multiple sites had an elevated hazard ratio (HR) compared to those with no fracture for pneumonia, respiratory failure, heart failure, and cerebrovascular disease (HR range, 1.15-2.09, all P < 0.05), while humerus and radius/ulna fracture were associated with an elevated HR for congestive heart failure and cerebrovascular disease (HR range, 1.38-1.72, all P < 0.05). CONCLUSIONS Fragility fractures were associated with an increased incidence of cardiorespiratory diseases among adults with intellectual disabilities.
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Affiliation(s)
- Daniel G Whitney
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, USA; Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, USA.
| | - Tao Xu
- Kidney Epidemiology and Cost Center, School of Public Health, University of Michigan, Ann Arbor, USA
| | - Daniel Whibley
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, USA; Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, USA
| | - Steven R Erickson
- Department of Clinical Pharmacy, College of Pharmacy, University of Michigan, Ann Arbor, USA
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Whitney DG. Mediating effects of post-fracture cardiorespiratory disease on mortality for adults with cerebral palsy: A cohort study. Ann Phys Rehabil Med 2022; 65:101661. [PMID: 35351653 PMCID: PMC9613788 DOI: 10.1016/j.rehab.2022.101661] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 02/18/2022] [Accepted: 03/02/2022] [Indexed: 11/25/2022]
Affiliation(s)
- Daniel G Whitney
- Department of Physical Medicine and Rehabilitation, University of Michigan, 325 E. Eisenhower, Ann Arbor, MI 48108, USA; Institute for Healthcare Policy and Innovation, University of Michigan, 2800 Plymouth Rd., Ann Arbor, MI 48109, USA.
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Whitney DG. Osteoporosis medication is associated with mortality risk reduction among adults with epilepsy: An observational study. Bone 2021; 150:116003. [PMID: 33984552 DOI: 10.1016/j.bone.2021.116003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 03/31/2021] [Accepted: 05/05/2021] [Indexed: 11/16/2022]
Abstract
BACKGROUND Adults with epilepsy have an increased risk of fragility fractures, which contributes to an accelerated rate of premature morbidity and mortality. In the general population, osteoporosis treatment has shown improvements in health and survival, possibly through improving skeletal robustness; however, the effect of osteoporosis medication on survival among adults with epilepsy has not been investigated. The purpose of this propensity score-matched, observational cohort study was to determine if osteoporosis medication was associated with mortality risk among adults with epilepsy. An exploratory analysis then examined the association between the type of osteoporosis medication with mortality. METHODS Data from 01/01/2012-09/30/2017 was extracted from Optum Clinformatics® Data Mart. Adults ≥50 years of age with epilepsy that were treatment naïve for and initiated osteoporosis medication (EP new users) were the primary group of interest, and were compared to adults with epilepsy that were not prescribed osteoporosis medication (EP no users) and adults without epilepsy that were treatment naïve for and initiated osteoporosis medication (w/o EP new users). Comparison groups were matched 1:4 to EP new users (n = 733; comparison groups, n = 2932) for demographics, glucocorticoid and antiseizure medication, prior 12-month fracture, and the Elixhauser comorbidity index. Crude incidence rate (IR) and IR ratio (IRR and 95% confidence intervals [CI]) was estimated for mortality for up to 3 years of follow-up. For new users, the association between type of osteoporosis medication (bisphosphonates vs. others) and mortality was explored using Cox proportional hazards regression after adjusting for all covariates. RESULTS For new users, the majority of the prescribed osteoporosis medications were bisphosphonates (~83%). The incidence of mortality for EP new users was lower compared to EP no users (IRR = 0.69; 95%CI = 0.52-0.93), but elevated compared to w/o EP new users (IRR = 1.42; 95%CI = 1.04-1.94). Comparing bisphosphonates to other medications for new users (P for EP group interaction = 0.089), EP new users showed a lower fully adjusted hazard ratio for mortality (HR = 0.56; 95%CI = 0.30-1.04), but was marginally insignificant (P = 0.066), while w/o EP new users showed no evidence of an association (HR = 1.09; 95%CI = 0.72-1.65). CONCLUSIONS Osteoporosis medication initiation was associated with a lower 3-year risk of mortality among adults with epilepsy. The exploratory analysis revealed potential evidence of a unique protective effect of bisphosphonates as compared to other osteoporosis medications on 3-year mortality for adults with epilepsy.
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Affiliation(s)
- Daniel G Whitney
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA; Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, MI, USA.
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Whitney DG, Kalia V, Rajapakse CS, Fedak Romanowski EM, Caird MS, Hurvitz EA, Jepsen KJ. The effect of age when initiating anti-seizure medication therapy on fragility fracture risk for children with epilepsy. Bone 2021; 149:115996. [PMID: 33962082 DOI: 10.1016/j.bone.2021.115996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 04/26/2021] [Accepted: 04/29/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Anti-seizure medication (ASM) is necessary to manage epilepsy and often prescribed to children and adolescents, but can lead to iatrogenic effects, including bone fragility by altering bone metabolism. Disrupting bone metabolism during crucial developmental stages could have a lasting adverse effect on bone health. Therefore, the objective of this propensity score-matched, observational cohort study was to determine if age when initiating ASM therapy across developmental stages (from pre- to post-puberty) for individuals with epilepsy was associated with an increased risk of fragility fracture. METHODS Data from 01/01/2011 to 12/31/2018 were extracted from Optum Clinformatics® Data Mart. Children aged 4-21 years at baseline with at least 5 years of continuous health plan enrollment were included to allow for a 1-year baseline and 4-years of follow-up. The primary group of interest included new ASM users (i.e., treatment naïve) with epilepsy. The comparison group, no ASM users without epilepsy, was matched 1:14 to new ASM users with epilepsy for demographics and baseline fracture. To provide a proxy for developmental stages, age was categorized as 4-6 (pre-puberty), 7-10 (early puberty), 11-13 (mid-puberty), 14-17 (late puberty), and 18-21 (post-puberty). Crude incidence rate (IR; per 1000 person years) and IR ratio (IRR and 95% confidence intervals [CI]) were estimated for non-trauma fracture (NTFx) for up to 4-years of follow-up. RESULTS Prior to stratifying by age group, the crude NTFx IR (95% CI) of 20.6 (16.5-24.8) for new ASM users with epilepsy (n = 1205) was 34% higher (IRR = 1.34; 95% CI = 1.09-1.66) than the crude NTFx IR (95% CI) of 15.4 (14.4-16.3) for no ASM users without epilepsy. The groups exhibited a different pattern of NTFx incidence with age, with new ASM users showing a more dramatic increase and peaking at 11-13 years, then decreasing with the older age groups. The crude IR and IRR were elevated for new ASM users with epilepsy compared to no ASM users without epilepsy for each age group (10% to 55% higher), but was only statistically significant for 11-13 years (IRR = 1.55; 95% CI = 1.02-2.36). CONCLUSIONS Children with epilepsy initiating ASM therapy may be vulnerable to fragility fracture, especially when initiating ASM around the time of puberty. Clinicians should be aware of this age-related association and consider age-appropriate adjunct bone fragility therapies.
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Affiliation(s)
- Daniel G Whitney
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA; Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, MI, USA.
| | - Vivek Kalia
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA
| | - Chamith S Rajapakse
- Department of Radiology, University of Pennsylvania, Philadelphia, PA, USA; Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Erin M Fedak Romanowski
- Department of Pediatrics, Division of Pediatric Neurology, University of Michigan, Ann Arbor, MI, USA
| | - Michelle S Caird
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Edward A Hurvitz
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA
| | - Karl J Jepsen
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI, USA
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Whitney DG, Caird MS, Hurvitz EA, Rajapakse CS, Fedak Romanowski EM. Effect of levetiracetam and oxcarbazepine on 4-year fragility fracture risk among prepubertal and pubertal children with epilepsy. Epilepsia 2021; 62:2180-2189. [PMID: 34250606 DOI: 10.1111/epi.16998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/23/2021] [Accepted: 06/23/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVE The objective of this study was to determine whether two commonly prescribed antiseizure medications (ASMs), levetiracetam (LEV) and oxcarbazepine (OXC), were associated with an increased risk of fragility fracture in children with epilepsy when initiating therapy during a crucial period of bone development, namely, pre- and midpuberty. METHODS Claims data from January 1, 2009 to December 31, 2018 were extracted from the Optum Clinformatics Data Mart. Children aged 4-13 years at baseline with at least 5 years of continuous health plan enrollment were included to allow for a 1-year baseline (e.g., pre-ASM exposure) and 4 years of follow-up. Children with epilepsy who were ASM naïve were grouped based on whether ASM treatment initiation included LEV or OXC. The comparison group included children without epilepsy and without ASM exposure. Crude incidence rate (IR; n per 1000 person-years) and IR ratio (IRR; with 95% confidence interval [CI]) were estimated for nontrauma fracture (NTFx), a claims-based proxy for fragility fracture, for up to 4 years of follow-up. Cox proportional hazards regression estimated the hazard ratio (HR; with 95% CI) after adjusting for demographic variables, motor impairment, and baseline fracture. RESULTS The crude IR (95% CI) of NTFx was 21.5 (21.2-21.8) for non-ASM-users without epilepsy (n = 271 346), 19.8 (12.3-27.2) for LEV (n = 358), and 34.4 (21.1-47.7) for OXC (n = 203). Compared to non-ASM-users, the crude IRR of NTFx was similar for LEV (IRR = .92, 95% CI = .63-1.34) and elevated for OXC (IRR = 1.60, 95% CI = 1.09-2.35); the crude IRR of NTFx was elevated for OXC compared to LEV (IRR = 1.74, 95% CI = 1.02-2.99). The findings were consistent after adjusting for covariates, except when comparing OXC to LEV (HR = 1.71, 95% CI = .99-2.93), which was marginally statistically insignificant (p = .053). SIGNIFICANCE Initiating OXC, but not LEV, therapy among 4-13-year-olds with epilepsy is associated with an elevated risk of fragility fracture. Studies are needed to determine whether these children could benefit from adjunct bone fragility therapies.
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Affiliation(s)
- Daniel G Whitney
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA.,Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, MI, USA
| | - Michelle S Caird
- Department of Orthopedic Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Edward A Hurvitz
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA
| | - Chamith S Rajapakse
- Department of Radiology, University of Pennsylvania, Philadelphia, PA, USA.,Department of Orthopedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Erin M Fedak Romanowski
- Department of Pediatrics, Division of Pediatric Neurology, University of Michigan, Ann Arbor, MI, USA
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Matlen LB, Whitney DG, Whibley D, Jansen EC, Chervin RD, Dunietz GL. Obstructive sleep apnea and fractures in children and adolescents. J Clin Sleep Med 2021; 17:1853-1858. [PMID: 33928906 DOI: 10.5664/jcsm.9318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
STUDY OBJECTIVES To examine, among girls and boys, associations between site-specific extremity fracture and sleep apnea diagnosis or treatment. METHODS A cross-sectional analysis of claims data from 2016-2018 for children aged 2-18. Children with sleep apnea, continuous positive airway pressure, adenotonsillectomy, and fracture were identified using ICD10, CPT and HCPCS codes. We examined sex-stratified associations between site-specific fracture, sleep apnea and sleep apnea treatment. RESULTS Among 2,327,104 children, 9,547 (0.41%) had sleep apnea and nearly 61% were treated. Girls with sleep apnea, treated or untreated, had increased odds of lower, but not upper, extremity fracture compared to those without sleep apnea (treated 1.56, 95% CI 1.11, 2.21; untreated OR 1.63, 95% CI 1.09, 2.44). Only boys untreated for sleep apnea had increased odds of lower extremity fracture in comparison to those without a diagnosis of sleep apnea (OR 1.65, 95% CI 1.20,2.27). Interestingly, boys treated for sleep apnea but not those untreated, in comparison to boys without sleep apnea, had different (reduced) odds of upper extremity fracture (OR 0.74, 95% CI 0.59, 0.95). CONCLUSIONS These large datasets provide evidence that both boys and girls with untreated sleep apnea have higher odds of lower extremity fractures. However, treatment for sleep apnea was associated with improved odds of lower extremity fracture only in boys. Upper extremity data were less clear. These data are cross-sectional and cannot show causality, but they suggest that treatment for sleep apnea may lower risk for extremity fractures in boys.
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Affiliation(s)
- Lisa B Matlen
- Department of Pediatrics and Sleep Disorders Centers, University of Michigan, Ann Arbor, MI
| | - Daniel G Whitney
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI
| | - Daniel Whibley
- Epidemiology Group, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, UK
| | - Erica C Jansen
- Department of Nutritional Sciences, School of Public Health, University of Michigan, Ann Arbor, MI
| | - Ronald D Chervin
- Department of Neurology, Division of Sleep Medicine, University of Michigan, Ann Arbor, MI
| | - Galit Levi Dunietz
- Department of Nutritional Sciences, School of Public Health, University of Michigan, Ann Arbor, MI.,Department of Neurology, Division of Sleep Medicine, University of Michigan, Ann Arbor, MI
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Chen SF, Pan HY, Huang CR, Huang JB, Tan TY, Chen NC, Hsu CY, Chuang YC. Autonomic Dysfunction Contributes to Impairment of Cerebral Autoregulation in Patients with Epilepsy. J Pers Med 2021; 11:jpm11040313. [PMID: 33920691 PMCID: PMC8073240 DOI: 10.3390/jpm11040313] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/16/2021] [Accepted: 04/16/2021] [Indexed: 12/26/2022] Open
Abstract
Patients with epilepsy frequently experience autonomic dysfunction and impaired cerebral autoregulation. The present study investigates autonomic function and cerebral autoregulation in patients with epilepsy to determine whether these factors contribute to impaired autoregulation. A total of 81 patients with epilepsy and 45 healthy controls were evaluated, assessing their sudomotor, cardiovagal, and adrenergic functions using a battery of autonomic nervous system (ANS) function tests, including the deep breathing, Valsalva maneuver, head-up tilting, and Q-sweat tests. Cerebral autoregulation was measured by transcranial Doppler examination during the breath-holding test, the Valsalva maneuver, and the head-up tilting test. Autonomic functions were impaired during the interictal period in patients with epilepsy compared to healthy controls. The three indices of cerebral autoregulation—the breath-holding index (BHI), an autoregulation index calculated in phase II of the Valsalva maneuver (ASI), and cerebrovascular resistance measured in the second minute during the head-up tilting test (CVR2-min)—all decreased in patients with epilepsy. ANS dysfunction correlated significantly with impairment of cerebral autoregulation (measured by BHI, ASI, and CVR2-min), suggesting that the increased autonomic dysfunction in patients with epilepsy may augment the dysregulation of cerebral blood flow. Long-term epilepsy, a high frequency of seizures, and refractory epilepsy, particularly temporal lobe epilepsy, may contribute to advanced autonomic dysfunction and impaired cerebral autoregulation. These results have implications for therapeutic interventions that aim to correct central autonomic dysfunction and impairment of cerebral autoregulation, particularly in patients at high risk for sudden, unexplained death in epilepsy.
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Affiliation(s)
- Shu-Fang Chen
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (S.-F.C.); (H.-Y.P.); (C.-R.H.); (J.-B.H.); (T.-Y.T.); (N.-C.C.)
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Hsiu-Yung Pan
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (S.-F.C.); (H.-Y.P.); (C.-R.H.); (J.-B.H.); (T.-Y.T.); (N.-C.C.)
- Department of Emergency Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Chi-Ren Huang
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (S.-F.C.); (H.-Y.P.); (C.-R.H.); (J.-B.H.); (T.-Y.T.); (N.-C.C.)
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Jyun-Bin Huang
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (S.-F.C.); (H.-Y.P.); (C.-R.H.); (J.-B.H.); (T.-Y.T.); (N.-C.C.)
- Department of Emergency Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Teng-Yeow Tan
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (S.-F.C.); (H.-Y.P.); (C.-R.H.); (J.-B.H.); (T.-Y.T.); (N.-C.C.)
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Nai-Ching Chen
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (S.-F.C.); (H.-Y.P.); (C.-R.H.); (J.-B.H.); (T.-Y.T.); (N.-C.C.)
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Chung-Yao Hsu
- Department of Neurology, School of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
| | - Yao-Chung Chuang
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (S.-F.C.); (H.-Y.P.); (C.-R.H.); (J.-B.H.); (T.-Y.T.); (N.-C.C.)
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Neurology, School of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
- Institute for Translation Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
- Department of Biological Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
- Correspondence:
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Whitney DG, Devlin MJ, Alford AI, Caird MS. Pattern of bone marrow lipid composition measures along the vertebral column: A descriptive study of adolescents with idiopathic scoliosis. Bone 2021; 142:115702. [PMID: 33099030 PMCID: PMC9426858 DOI: 10.1016/j.bone.2020.115702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/03/2020] [Accepted: 10/18/2020] [Indexed: 11/21/2022]
Abstract
BACKGROUND There is evidence that the extent of vertebral bone marrow adiposity increases caudally along the vertebral column in children and adolescents. However, no studies have examined the lipid composition of bone marrow along the vertebral column, which may uniquely influence bone acquisition and metabolism during growth independent of the amount of bone marrow adipose tissue. The goal of this study was to characterize the pattern of lipid composition index measures from the thoracic to lumbar spine (T11-L4) among a sample of adolescents with idiopathic scoliosis (AIS) undergoing routine orthopedic surgical care for scoliosis correction. METHODS Adolescents between 14 and 18 years of age, with a confirmed diagnosis of AIS, and undergoing routine posterior spinal fusion surgery at our institution were initially included for this descriptive study. The surgery yielded transpedicular vertebral body marrow samples from T11 through L4; 11 participants had bone marrow samples from T11 through L2 and 4 of the 11 participants had marrow samples from T11 through L4. Lipid composition index measures, including the saturated, monounsaturated, and polyunsaturated index, were measured using a targeted lipidomics technique. Linear regression equation for the slope (m) and Pearson correlation coefficient (r) was computed to assess the pattern of lipid composition index measures along the vertebral column from T11 to L2 (n = 11) and extended analysis to L4. Exploratory analyses were performed to examine the association between the pattern of lipid composition measures (individual slopes) and physical characteristics for T11-L2. RESULTS For T11-L2, the slope of the saturated index was near 0 (r = 0.08; P = 0.92), whereas the slopes of the unsaturated indices were approximately opposite of one another: the monounsaturated index exhibited a -0.55 change (r = 0.58; P = 0.42) per vertebra and the polyunsaturated index exhibited a 0.52 change (r = 0.72; P = 0.28) per vertebra in the caudal direction from T11-L2. For T11-L4, there were modest changes in slope for the saturated (m = 0.12; r = 0.30; P = 0.57) and monounsaturated (m = -0.68; r = 0.74; P = 0.09) indices, while the polyunsaturated index slope remained similar (m = 0.56; r = 0.89; P = 0.02). Age, sex, height, body mass, and BMI were not associated with the pattern of any of the lipid composition index measures. CONCLUSIONS Study findings in this small sample of individuals with AIS suggest that the bone marrow saturated index may be relatively stable across T11-L4, while the monounsaturated index may decrease by 0.55-0.68% per vertebra and the polyunsaturated index may increase by 0.52-0.56% per vertebra in the caudal direction.
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Affiliation(s)
- Daniel G Whitney
- Department of Physical Medicine and Rehabilitation, University of Michigan, 325 E. Eisenhower, Ann Arbor, MI 48108, United States of America; Institute for Healthcare Policy and Innovation, University of Michigan, 2800 Plymouth Rd., Ann Arbor, MI 48109, United States of America.
| | - Maureen J Devlin
- Department of Anthropology, University of Michigan, 1085 S. University Ave., Ann Arbor, MI 48109, United States of America
| | - Andrea I Alford
- Department of Orthopaedic Surgery, University of Michigan, A. Alfred Taubman Biomedical Sciences Research Building, Room 2009, Ann Arbor, MI 48109, United States of America
| | - Michelle S Caird
- Department of Orthopaedic Surgery, University of Michigan, A. Alfred Taubman Biomedical Sciences Research Building, Room 2009, Ann Arbor, MI 48109, United States of America
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