MDT-Based Umbrella Decision Model for Geriatric Lung Cancer Patients

Background:

China faces a dual epidemiological trend of aging and increasing non-smoking-related lung cancer. Elderly patients (≥60 years) now constitute the majority of lung cancer cases but are often underrepresented in clinical trials. They present unique challenges including physiological decline, multiple comorbidities, and high heterogeneity, which cannot be adequately addressed by single-discipline decision-making. Multidisciplinary team (MDT) models have shown promise in improving outcomes, yet standardized geriatric-specific pathways remain lacking.

Objective:

To establish and validate an MDT-based umbrella decision-making model for elderly lung cancer patients, integrating comprehensive geriatric assessment (CGA) and individualized treatment planning across multiple therapeutic modalities.

Study Design:

This is a prospective, single-arm interventional study conducted at West China Hospital, Sichuan University. A historical control cohort (2014-2024) will be extracted from the hospital information system. The primary historical comparison will use patients treated during the most recent pre-implementation period (2021-2024) to reduce differences in staging, imaging, molecular testing, and access to targeted and immunotherapies. Patients treated during 2014-2020 will be included only in era-stratified sensitivity analyses.

Participants:

A total of 2,000 elderly patients (age 60-90 years) with histologically or cytologically confirmed lung cancer (stage I-IV) will be enrolled. Inclusion criteria also include ECOG PS 0-2, life expectancy ≥3 months, and written informed consent. Exclusion criteria include other active malignancies, severe cognitive impairment (MMSE <20), contraindications to examinations, severe organ failure, and concurrent participation in other interventional trials.

Intervention:

All enrolled patients undergo MDT discussion involving thoracic surgery, geriatrics, respiratory medicine, oncology, rehabilitation, and radiology. The MDT formulates a personalized treatment plan based on tumor characteristics and CGA results (including nutritional, functional, and psychological status). Treatments may include:

1. Surgery (lobectomy, segmentectomy, wedge resection)
2. Ablation (radiofrequency, microwave, cryoablation)
3. Stereotactic body radiotherapy (SBRT)
4. Neoadjuvant immunochemotherapy
5. Medical oncology (chemotherapy, targeted therapy, immunotherapy)
6. Best supportive care and active surveillance

Standardized perioperative management and long-term follow-up (up to 5 years) are implemented. Follow-up assessments include imaging (CT, MRI, PET/CT as indicated), pulmonary function tests, quality of life questionnaires (EORTC QLQ-LC43), and adverse event monitoring.

Outcomes:

1. Primary outcome: 3-year progression-free survival (PFS) assessed by RECIST v1.1
2. Secondary outcomes: 1-, 3-, and 5-year overall survival (OS); objective response rate (ORR); disease control rate (DCR); quality of life changes; incidence and severity of adverse events (CTCAE v5.0); healthcare resource utilization

Statistical Analysis:

Analyses will be performed on full analysis set (FAS), per-protocol set (PPS), and safety set (SS). Survival curves will be estimated using Kaplan-Meier method and compared by log-rank test. Multivariable Cox regression will identify independent prognostic factors. Propensity score matching will be used to compare MDT group with historical controls. Missing data will be handled by multiple imputation.

Ethics and Dissemination:

The prospective study protocol has been approved by the Ethics Committee of West China Hospital, Sichuan University (Approval No. 1773, 2025). The use of retrospective medical record data from 2014 to 2024 has been separately approved by the same Ethics Committee (Approval No. 2287, 2025). Written informed consent will be obtained from all prospectively enrolled participants, while the consent requirements for the retrospective cohort will be handled in accordance with the corresponding ethics approval. The study will be conducted in accordance with the Declaration of Helsinki and applicable Chinese regulations. Results will be disseminated through peer-reviewed publications and conference presentations.

Safety Monitoring： An independent data monitoring committee is not planned because the study evaluates a CGA-informed MDT care pathway and does not mandate the use of an investigational drug or device. All specific anticancer treatments will be delivered according to routine clinical practice and applicable treatment guidelines.Adverse events will be identified and managed by the treating clinical team. Serious adverse events will be reported to the principal investigator within 24 hours after awareness and reported to the Ethics Committee in accordance with institutional requirements.A study safety monitoring group comprising investigators from relevant clinical disciplines will review serious adverse events, grade 3 or higher treatment-related adverse events, unexpected study-related risks, and major protocol deviations at prespecified intervals. The group may recommend protocol modification, additional participant protection measures, or temporary suspension of study-specific procedures when necessary.