Older adults, frailty and perioperative risk¶
TL;DR — Chronological age is a weak summary of reserve; frailty consistently predicts worse outcomes after spine surgery (Chan 2021, PMID 33548521) (Baek 2023, PMID 37996826). In a prospective cohort of 89 adults aged ≥70 undergoing spine surgery, 40.5% developed delirium, and delirium was associated with longer stay (OR 3.66, 95% CI 1.48–9.04) and lower odds of discharge home (OR 0.22, 95% CI 0.07–0.69) (Brown 2016, PMID 27696373). Decision-making should include cognition, medications, nutrition, bone health, falls, social support and recovery destination. Optimization changes risk; it does not merely label it.
Frailty as reserve¶
Frailty indices combine deficits, function or phenotype measures and predict complications, length of stay, discharge destination and mortality across degenerative spine surgery (Moskven 2018, PMID 30053520) (Veronesi 2021, PMID 33815887). Different instruments are not interchangeable, so thresholds must travel with the tool.
Delirium¶
Prospective validated assessment found delirium in 36 of 89 adults aged ≥70; 47.2% of cases were purely hypoactive (Brown 2016, PMID 27696373). Lower baseline cognition, higher pain, more IV fluid and antidepressant use were independent predictors; chart review alone would miss quiet cases.
Falls and DCM¶
Falls are both a symptom and a harm amplifier in DCM. Lower grip strength predicted falls in a 135-person prospective study (Inose 2021, PMID 33496544), while postoperative fall incidence decreased markedly in another multicenter diary cohort (Kimura 2020, PMID 31809466).
Bone and construct risk¶
Osteoporosis increases fixation failure, subsidence and junctional problems when fusion is used. Bone density, vertebral quality, vitamin status and anti-osteoporosis treatment should be considered before elective instrumentation; decompression-only decisions may have a different bone-risk profile. A 71-study systematic review (12,278 patients) associated low bone density with cage subsidence, screw loosening and fracture-related junctional kyphosis, while emphasizing heterogeneous methods and nonstandard thresholds (Filley 2024, PMID 38962714).
Medication and physiology¶
Medication exposure, cognition, pain and physiological vulnerability contribute to postoperative delirium risk; drug classes and causal effects vary across studies (Brown 2016, PMID 27696373; Baek 2020, PMID 33252809). Medication review should therefore document sedative and anticholinergic exposure rather than assume that chronological age captures the risk.
Prehabilitation and discharge¶
Optimization includes strength/activity where feasible, nutrition, smoking cessation, cognition/delirium planning, medication review, home supports and realistic destination planning. A review of eight lumbar- surgery prehabilitation trials (739 participants) found heterogeneous small studies and very-low-certainty estimates that were insufficient for practice recommendations (de Oliveira 2025, PMID 40110551). Modifiable vulnerabilities should be recorded rather than absorbed into age.
Shared decision frame¶
Estimate benefit in the patient's target function, then subtract perioperative and recovery burden. A smaller decompression may be preferable when it achieves the neurological objective; fusion or extensive cervical reconstruction needs a separately justified gain. Nonoperative care is not risk-free when walking loss or myelopathy progresses.
Decision table¶
| Domain | Measure/example | Actionable question |
|---|---|---|
| Frailty | Deficit or phenotype index | Is reserve modifiable? |
| Cognition | Baseline screen | Who will detect hypoactive delirium? |
| Falls | History, grip, gait | Is cord dysfunction contributing? |
| Bone | DXA/vertebral quality | Will fixation hold? |
| Nutrition | Weight loss, albumin context | Can intake be improved? |
| Medication | Sedative/anticholinergic load | What can be reduced? |
| Social | Caregiver/home layout | Where will recovery occur? |
| Goals | Walking, hands, independence | Is expected gain meaningful? |
Evidence map¶
The table records the page-specific live PubMed retrieval set; inclusion here maps evidence, not endorsement of every intervention.
| PMID | Year | Design | Contribution to this page |
|---|---|---|---|
| 33548521 | 2021 | systematic review | Frailty adversely affects outcomes of patients undergoing spine surgery: a systematic review (Chan 2021, PMID 33548521) |
| 37996826 | 2023 | meta-analysis | Impact of frailty on the outcomes of patients undergoing degenerative spine surgery: a systematic revi… (Baek 2023, PMID 37996826) |
| 27696373 | 2016 | clinical/observational study | Delirium After Spine Surgery in Older Adults: Incidence, Risk Factors, and Outcomes (Brown 2016, PMID 27696373) |
| 30053520 | 2018 | systematic review | The impact of frailty and sarcopenia on postoperative outcomes in adult spine surgery. A systematic re… (Moskven 2018, PMID 30053520) |
| 33815887 | 2021 | systematic review | The Impact of Frailty on Spine Surgery: Systematic Review on 10 years Clinical Studies (Veronesi 2021, PMID 33815887) |
| 33496544 | 2021 | prospective study | Predictors of Falls in Patients with Degenerative Cervical Myelopathy: A Prospective Multi-institution… (Inose 2021, PMID 33496544) |
| 31809466 | 2020 | prospective study | Effectiveness of Surgical Treatment for Degenerative Cervical Myelopathy in Preventing Falls and Fall-… (Kimura 2020, PMID 31809466) |
| 28141603 | 2017 | systematic review | Prevention and Management of Postoperative Delirium in Elderly Patients Following Elective Spinal Surg… (Nazemi 2017, PMID 28141603) |
| 36819629 | 2023 | prospective study | Predictors of Postoperative Delirium in Older Patients Undergoing Elective Spine Surgery (Kimura 2023, PMID 36819629) |
| 28291765 | 2017 | clinical/observational study | Cervical Spine Surgery Complications and Risks in the Elderly (Radcliff 2017, PMID 28291765) |
| 41912716 | 2026 | meta-analysis | Impact of frailty on surgical outcomes in degenerative cervical myelopathy: a systematic review and me… (Bagherzadeh 2026, PMID 41912716) |
| 41452489 | 2025 | meta-analysis | The influence of frailty on outcomes of adult spinal deformity surgery: A systematic review and meta-a… (Rashidi 2025, PMID 41452489) |
| 38937352 | 2024 | meta-analysis | Outcomes following spinal instrumented fusions in patients with parkinson's disease: a systematic revi… (Alissa 2024, PMID 38937352) |
| 37878249 | 2024 | systematic review | Frailty as a predictor of postoperative outcomes in neurosurgery: a systematic review (Roy 2024, PMID 37878249) |
| 40691586 | 2026 | systematic review | The characterization of frailty in spine surgery: a systematic review of frailty indices (Yu 2026, PMID 40691586) |
| 41195621 | 2026 | meta-analysis | Enhanced Recovery After Surgery (ERAS) in Spine Surgery: A Systematic Review and Meta-Analysis of Spin… (Büchel 2026, PMID 41195621) |
| 35385787 | 2022 | systematic review | The measurements of frailty and their possible application to spinal conditions: a systematic review (Moskven 2022, PMID 35385787) |
| 38382093 | 2025 | systematic review | Frailty Influence on Postoperative Surgical Site Infections After Surgery for Degenerative Spine Disea… (Manzetti 2025, PMID 38382093) |
| 41734017 | 2026 | meta-analysis | Comparison of the performance metrics of two frailty scales in spinal surgery: a systematic review and… (Venero 2026, PMID 41734017) |
| 41352682 | 2026 | meta-analysis | Prognostic Performance of mFI-5 and mFI-11 Frailty Indices in Elective Spine Surgery: A Systematic Rev… (Xu 2026, PMID 41352682) |
| 35123046 | 2022 | systematic review | Which frailty scales for patients with adult spinal deformity are feasible and adequate? A systematic … (Kitamura 2022, PMID 35123046) |
| 40830528 | 2025 | clinical/observational study | Incidence and risk factors of pulmonary complications after lumbar spine surgery, 2010-2019 (Huang 2025, PMID 40830528) |
| 16517388 | 2006 | clinical/observational study | Postoperative delirium in spine surgery (Kawaguchi 2006, PMID 16517388) |
| 32905726 | 2020 | clinical/observational study | Correlating Psychological Comorbidities and Outcomes After Spine Surgery (Jackson 2020, PMID 32905726) |
| 41115102 | 2026 | clinical/observational study | Exploring Neuroinflammation and Its Role in Postoperative Cognitive Dysfunction following Spine Surgery (Ruhnau 2026, PMID 41115102) |
| 31475050 | 2019 | clinical/observational study | Etiology and Related Factors of Postoperative Delirium in Orthopedic Surgery (Song 2019, PMID 31475050) |
| 35730759 | 2024 | clinical/observational study | Association Between Anesthetics and Postoperative Delirium in Elderly Patients Undergoing Spine Surger… (Chang 2024, PMID 35730759) |
| 31422644 | 2019 | systematic review | Antidepressants in Spine Surgery: A Systematic Review to Determine Benefits and Risks (Bayoumi 2019, PMID 31422644) |
| 38970345 | 2024 | clinical/observational study | Extracellular Vesicle MicroRNAs as Predictive Biomarkers in Postoperative Delirium After Spine Surgery… (Cho 2024, PMID 38970345) |
| 37898990 | 2024 | clinical/observational study | Association between preoperative neutrophil-lymphocyte ratio, uric acid, and postoperative delirium in… (Kato 2024, PMID 37898990) |
| 36744116 | 2023 | clinical/observational study | The Relationship of Postoperative Pain and Opioid Consumption to Postoperative Delirium After Spine Su… (Sica 2023, PMID 36744116) |
| 23797502 | 2013 | clinical/observational study | Incidence and risk factors for postoperative delirium after lumbar spine surgery (Fineberg 2013, PMID 23797502) |
| 32898243 | 2020 | clinical/observational study | Brief Preoperative Screening for Frailty and Cognitive Impairment Predicts Delirium after Spine Surgery (Susano 2020, PMID 32898243) |
| 33252809 | 2020 | meta-analysis | Risk Factors of Postoperative Delirium in Older Adult Spine Surgery Patients: A Meta-Analysis (Baek 2020, PMID 33252809) |
| 38962714 | 2024 | systematic review | The influence of osteoporosis on mechanical complications in lumbar fusion surgery (Filley 2024, PMID 38962714) |
| 40110551 | 2025 | meta-analysis | Effects of prehabilitation on outcomes following elective lumbar spine surgery (de Oliveira 2025, PMID 40110551) |
Interpretation rules¶
- Anatomical narrowing is necessary but not sufficient for a symptomatic stenosis diagnosis.
- Lumbar claudication, lumbar radiculopathy, cervical myelopathy and imaging-only compression are analyzed separately.
- Absolute changes, confidence intervals and responder proportions outrank within-group significance.
- Comparator choice determines the question a trial can answer.
- Reoperation, falls, delirium and recovery burden are outcomes, not footnotes.
- Subgroup claims require an interaction or externally validated treatment-effect model.
- Older age is not a contraindication; reserve, goals and modifiable vulnerability are assessed directly.
- Absence of deterioration in a cohort does not guarantee individual stability.
- Evidence is research knowledge, not individualized medical advice.
Open questions¶
- Which frailty instrument adds the most useful prediction beyond age and procedure type while remaining feasible in routine spine care? (Chan 2021, PMID 33548521)
- Does targeted preoperative optimization of frailty components improve outcomes, rather than frailty serving only as a risk marker? (Baek 2023, PMID 37996826)
- Which multicomponent delirium-prevention strategy reduces the 40.5% incidence observed with prospective assessment in older spine-surgery patients? (Brown 2016, PMID 27696373)
Related pages¶
- Anatomy, classification and imaging — connected evidence domain.
- Epidemiology and natural history — connected evidence domain.
- Lumbar stenosis and neurogenic claudication — connected evidence domain.
- Cervical stenosis and degenerative myelopathy — connected evidence domain.
- Diagnosis and differential diagnosis — connected evidence domain.
- Overview — map of the whole condition.
References¶
- Chan V, et al. Frailty adversely affects outcomes of patients undergoing spine surgery: a systematic review. The spine journal : official journal of the North American Spine Society. 2021;21:988-1000. PMID 33548521
- Baek W, et al. Impact of frailty on the outcomes of patients undergoing degenerative spine surgery: a systematic review and meta-analysis. BMC geriatrics. 2023;23:771. PMID 37996826
- Brown CH, et al. Delirium After Spine Surgery in Older Adults: Incidence, Risk Factors, and Outcomes. Journal of the American Geriatrics Society. 2016;64:2101-2108. PMID 27696373
- Moskven E, et al. The impact of frailty and sarcopenia on postoperative outcomes in adult spine surgery. A systematic review of the literature. The spine journal : official journal of the North American Spine Society. 2018;18:2354-2369. PMID 30053520
- Veronesi F, et al. The Impact of Frailty on Spine Surgery: Systematic Review on 10 years Clinical Studies. Aging and disease. 2021;12:625-645. PMID 33815887
- Inose H, et al. Predictors of Falls in Patients with Degenerative Cervical Myelopathy: A Prospective Multi-institutional Study. Spine. 2021;46:1007-1013. PMID 33496544
- Kimura A, et al. Effectiveness of Surgical Treatment for Degenerative Cervical Myelopathy in Preventing Falls and Fall-related Neurological Deterioration: A Prospective Multi-institutional Study. Spine. 2020;45:E631-E638. PMID 31809466
- Nazemi AK, et al. Prevention and Management of Postoperative Delirium in Elderly Patients Following Elective Spinal Surgery. Clinical spine surgery. 2017;30:112-119. PMID 28141603
- Kimura A, et al. Predictors of Postoperative Delirium in Older Patients Undergoing Elective Spine Surgery. Spine surgery and related research. 2023;7:13-18. PMID 36819629
- Radcliff K, et al. Cervical Spine Surgery Complications and Risks in the Elderly. Spine. 2017;42:E347-E354. PMID 28291765
- Bagherzadeh S, et al. Impact of frailty on surgical outcomes in degenerative cervical myelopathy: a systematic review and meta-analysis. European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society. 2026;35:5294-5305. PMID 41912716
- Rashidi F, et al. The influence of frailty on outcomes of adult spinal deformity surgery: A systematic review and meta-analysis. Neurosurgical review. 2025;49:87. PMID 41452489
- Alissa AI, et al. Outcomes following spinal instrumented fusions in patients with parkinson's disease: a systematic review and meta-analysis. European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society. 2024;33:3420-3442. PMID 38937352
- Roy JM, et al. Frailty as a predictor of postoperative outcomes in neurosurgery: a systematic review. Journal of neurosurgical sciences. 2024;68:208-215. PMID 37878249
- Yu A, et al. The characterization of frailty in spine surgery: a systematic review of frailty indices. European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society. 2026;35:2020-2032. PMID 40691586
- Büchel C, et al. Enhanced Recovery After Surgery (ERAS) in Spine Surgery: A Systematic Review and Meta-Analysis of Spinal Surgery Sub - Specialities, Interventions and Efficacy. Global spine journal. 2026;16:1660-1672. PMID 41195621
- Moskven E, et al. The measurements of frailty and their possible application to spinal conditions: a systematic review. The spine journal : official journal of the North American Spine Society. 2022;22:1451-1471. PMID 35385787
- Manzetti M, et al. Frailty Influence on Postoperative Surgical Site Infections After Surgery for Degenerative Spine Disease and Adult Spine Deformity. Can a Frailty Index be a Valuable Summary Risk Indicator? A Systematic Review and Metanalysis of the Current Literature. Global spine journal. 2025;15:1338-1355. PMID 38382093
- Venero Jr C, et al. Comparison of the performance metrics of two frailty scales in spinal surgery: a systematic review and meta-analysis. Journal of neurosurgical sciences. 2026;70:131-139. PMID 41734017
- Xu GD, et al. Prognostic Performance of mFI-5 and mFI-11 Frailty Indices in Elective Spine Surgery: A Systematic Review and Meta-Analysis. World neurosurgery. 2026;205:124709. PMID 41352682
- Kitamura K, et al. Which frailty scales for patients with adult spinal deformity are feasible and adequate? A systematic review. The spine journal : official journal of the North American Spine Society. 2022;22:1191-1204. PMID 35123046
- Huang L, et al. Incidence and risk factors of pulmonary complications after lumbar spine surgery, 2010-2019. Perioperative medicine (London, England). 2025;14:88. PMID 40830528
- Kawaguchi Y, et al. Postoperative delirium in spine surgery. The spine journal : official journal of the North American Spine Society. 2006;6:164-9. PMID 16517388
- Jackson KL, et al. Correlating Psychological Comorbidities and Outcomes After Spine Surgery. Global spine journal. 2020;10:929-939. PMID 32905726
- Ruhnau J, et al. Exploring Neuroinflammation and Its Role in Postoperative Cognitive Dysfunction following Spine Surgery. Gerontology. 2026;72:29-40. PMID 41115102
- Song KJ, et al. Etiology and Related Factors of Postoperative Delirium in Orthopedic Surgery. Clinics in orthopedic surgery. 2019;11:297-301. PMID 31475050
- Chang JE, et al. Association Between Anesthetics and Postoperative Delirium in Elderly Patients Undergoing Spine Surgery: Propofol Versus Sevoflurane. Global spine journal. 2024;14:478-484. PMID 35730759
- Bayoumi AB, et al. Antidepressants in Spine Surgery: A Systematic Review to Determine Benefits and Risks. Asian spine journal. 2019;13:1036-1046. PMID 31422644
- Cho YE, et al. Extracellular Vesicle MicroRNAs as Predictive Biomarkers in Postoperative Delirium After Spine Surgery: Preliminary Study. The journals of gerontology. Series A, Biological sciences and medical sciences. 2024;79. PMID 38970345
- Kato K, et al. Association between preoperative neutrophil-lymphocyte ratio, uric acid, and postoperative delirium in elderly patients undergoing degenerative spine surgery. Journal of anesthesia. 2024;38:35-43. PMID 37898990
- Sica R, et al. The Relationship of Postoperative Pain and Opioid Consumption to Postoperative Delirium After Spine Surgery. Journal of pain research. 2023;16:287-294. PMID 36744116
- Fineberg SJ, et al. Incidence and risk factors for postoperative delirium after lumbar spine surgery. Spine. 2013;38:1790-6. PMID 23797502
- Susano MJ, et al. Brief Preoperative Screening for Frailty and Cognitive Impairment Predicts Delirium after Spine Surgery. Anesthesiology. 2020;133:1184-1191. PMID 32898243
- Baek W, et al. Risk Factors of Postoperative Delirium in Older Adult Spine Surgery Patients: A Meta-Analysis. AORN journal. 2020;112:650-661. PMID 33252809
- Filley A, et al. The influence of osteoporosis on mechanical complications in lumbar fusion surgery: a systematic review. North American Spine Society journal. 2024;18:100327. PMID 38962714
- de Oliveira LA, et al. Effects of prehabilitation on outcomes following elective lumbar spine surgery: A systematic review and meta-analysis. British journal of pain. 2025;19:257-273. PMID 40110551