Development and Validation of a Biopsy Decision Model for Nasopharyngeal Carcinoma Based on Serological Markers and Endoscopic Features
An observational study combines retrospective and prospective cohorts to develop, validate, and compare models based on Epstein-Barr virus (EBV)-related blood biomarkers alone, nasopharyngeal endoscopic scores alone, and their combination to support biopsy decisions for nasopharyngeal carcinoma (NPC). Existing clinical data will be analyzed retrospectively for model development and internal validation. Data from participants undergoing nasopharyngeal endoscopy and clinically indicated nasopharyngeal biopsy at participating centers will be collected prospectively for external validation. The study will assess the models' diagnostic performance and potential value in identifying individuals who may benefit from biopsy and reducing unnecessary biopsies. Clinical decisions will follow routine practice.
調査の概要
状態
状態
条件
条件
介入・治療
介入・治療
詳細な説明
The study includes a retrospective cohort for model development and internal validation and a prospective cohort for external validation at participating centers. Models based on EBV-related blood biomarkers alone, nasopharyngeal endoscopic scores alone, and their combination will be developed, validated, and compared.
研究の種類
研究の種類
入学 (推定)
入学
連絡先と場所
研究連絡先
研究連絡先
- 名前：Mingfang Ji
- 電話番号：86-0760-89880417
- メール：jmftbh@sina.com
研究場所
-
-
Guangdong
-
Zhongshan、Guangdong、中国、528403
- Zhongshan City People's Hospital
-
コンタクト：
- Mingfang Ji
- 電話番号：86-0760-89880417
- メール：jmftbh@sina.com
-
-
Guangxi
-
Nanning、Guangxi、中国、530022
- People's Hospital of Guangxi Zhuang Autonomous Region
-
コンタクト：
- Shenhong Qu, MD PhD
- 電話番号：86 15676172501
- メール：xhh2501@126.com
-
-
参加基準
適格基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
サンプリング方法
調査対象母集団
The study population comprises individuals undergoing nasopharyngeal endoscopy and clinically indicated nasopharyngeal biopsy for NPC risk assessment or suspected NPC at participating hospitals. The retrospective cohort will use existing clinical records, while the prospective cohort will enroll eligible individuals consecutively.
説明
Inclusion Criteria:
- Voluntarily agree to participate in the study and provide written informed consent;
- Be aged ≥18 years;
- Have available EBV-related serological test results or be able to provide blood samples for the relevant testing;
- Undergo nasopharyngeal endoscopy for nasopharyngeal carcinoma risk assessment or suspected nasopharyngeal carcinoma;
- Undergo nasopharyngeal biopsy as part of routine clinical care.
Exclusion Criteria:
- Previous confirmed diagnosis of nasopharyngeal carcinoma or prior treatment for nasopharyngeal carcinoma;
- Receipt of immunosuppressive therapy or other treatments that may affect serum antibody levels within the past 6 months;
- Severe organ dysfunction, including decompensated heart failure, respiratory failure, decompensated liver cirrhosis, or renal failure.
研究計画
研究はどのように設計されていますか？
デザインの詳細
- 観測モデル：COHORT
- 時間の展望：OTHER
グループ/コホートの数
コホートと介入
グループ/コホートグループ/コホート |
介入・治療介入・治療 |
|---|---|
|
Training Cohort
Participants selected from existing clinical records who underwent nasopharyngeal endoscopy and clinically indicated nasopharyngeal biopsy for NPC risk assessment or suspected NPC. EBV-related blood biomarker results, nasopharyngeal endoscopic scores, and pathological diagnoses will be analyzed for model development. |
EBV-related blood biomarkers, including P85-Ab, EBNA1-IgA, and VCA-IgA, among others, will be evaluated together with nasopharyngeal endoscopic scores to support biopsy decisions for nasopharyngeal carcinoma. Biopsy and treatment decisions will follow routine clinical practice. |
|
Internal Validation Cohort
Participants from the retrospective study population who are not included in the training cohort. Their EBV-related blood biomarker results, nasopharyngeal endoscopic scores, and pathological diagnoses will be used for internal validation of the developed models. |
EBV-related blood biomarkers, including P85-Ab, EBNA1-IgA, and VCA-IgA, among others, will be evaluated together with nasopharyngeal endoscopic scores to support biopsy decisions for nasopharyngeal carcinoma. Biopsy and treatment decisions will follow routine clinical practice. |
|
External Validation Cohort
Participants undergoing nasopharyngeal endoscopy and clinically indicated nasopharyngeal biopsy at participating centers will be enrolled prospectively. EBV-related blood biomarker results, nasopharyngeal endoscopic scores, and pathological diagnoses from clinically indicated biopsies will be collected for external validation of the developed models. Clinical decisions will follow routine practice. |
EBV-related blood biomarkers, including P85-Ab, EBNA1-IgA, and VCA-IgA, among others, will be evaluated together with nasopharyngeal endoscopic scores to support biopsy decisions for nasopharyngeal carcinoma. Biopsy and treatment decisions will follow routine clinical practice. |
この研究は何を測定していますか？
主要な結果の測定
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Sensitivity of serological, endoscopic, and combined models at prespecified risk thresholds
時間枠：Baseline
|
Sensitivity and corresponding 95% confidence intervals will be assessed and compared across models based on EBV-related blood biomarkers alone, nasopharyngeal endoscopic scores alone, and their combination at prespecified risk thresholds, separately in the internal validation cohort and the prospective external validation cohort, using nasopharyngeal biopsy histopathology as the reference standard. |
Baseline
|
|
Specificity of serological, endoscopic, and combined models at prespecified risk thresholds
時間枠：Baseline
|
Specificity and corresponding 95% confidence intervals will be assessed and compared across models based on EBV-related blood biomarkers alone, nasopharyngeal endoscopic scores alone, and their combination at prespecified risk thresholds, separately in the internal validation cohort and the prospective external validation cohort, using nasopharyngeal biopsy histopathology as the reference standard. |
Baseline
|
二次結果の測定
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Area under the receiver operating characteristic curve (AUC) of serological, endoscopic, and combined models
時間枠：Baseline
|
AUCs and corresponding 95% confidence intervals will be assessed and compared across models based on EBV-related blood biomarkers alone, nasopharyngeal endoscopic scores alone, and their combination, separately in the internal validation cohort and the prospective external validation cohort, using nasopharyngeal biopsy histopathology as the reference standard. |
Baseline
|
|
Calibration intercept of serological, endoscopic, and combined models
時間枠：Baseline
|
The calibration intercept will be calculated for each model using predicted probabilities and histopathological diagnoses, separately in the internal validation cohort and the prospective external validation cohort. An intercept of 0 indicates ideal calibration in this respect. |
Baseline
|
|
Calibration slope of serological, endoscopic, and combined models
時間枠：Baseline
|
The calibration slope will be calculated for each model using predicted probabilities and histopathological diagnoses, separately in the internal validation cohort and the prospective external validation cohort. A slope of 1 indicates ideal calibration in this respect. |
Baseline
|
|
Brier score of serological, endoscopic, and combined models
時間枠：Baseline
|
The Brier score will be calculated for each model as the mean squared difference between predicted probabilities and histopathological outcomes, coded as 1 for nasopharyngeal carcinoma and 0 otherwise, separately in the internal validation cohort and the prospective external validation cohort. Scores range from 0 to 1, with lower scores indicating better overall predictive accuracy. |
Baseline
|
|
Positive predictive value of serological, endoscopic, and combined models at prespecified risk thresholds
時間枠：Baseline
|
Positive predictive values and corresponding 95% confidence intervals will be calculated for each model at prespecified risk thresholds, separately in the internal validation cohort and the prospective external validation cohort, using nasopharyngeal biopsy histopathology as the reference standard. |
Baseline
|
|
Negative predictive value of serological, endoscopic, and combined models at prespecified risk thresholds
時間枠：Baseline
|
Negative predictive values and corresponding 95% confidence intervals will be calculated for each model at prespecified risk thresholds, separately in the internal validation cohort and the prospective external validation cohort, using nasopharyngeal biopsy histopathology as the reference standard. |
Baseline
|
|
Net benefit of model-based biopsy strategies
時間枠：Baseline
|
Decision curve analysis will be used to assess and compare the net benefit of biopsy strategies based on serological, endoscopic, and combined models with biopsy-all and biopsy-none strategies across risk thresholds, separately in the internal validation cohort and the prospective external validation cohort, using nasopharyngeal biopsy histopathology as the reference standard. |
Baseline
|
|
Potential percentage of biopsies avoided using model-based strategies at prespecified risk thresholds
時間枠：Baseline
|
For each serological, endoscopic, and combined model, the potential percentage of biopsies avoided will be calculated as the percentage of all evaluated participants undergoing biopsy whose predicted risk is below the prespecified threshold. This represents the potential reduction in biopsies relative to a biopsy-all strategy and will be assessed separately in the internal validation cohort and the prospective external validation cohort. |
Baseline
|
協力者と研究者
協力者
協力者
研究記録日
主要日程の研究
研究開始 (推定)
研究開始
一次修了 (推定)
一次修了
研究の完了 (推定)
研究の完了
試験登録日
最初に提出
最初に提出
QC基準を満たした最初の提出物
QC基準を満たした最初の提出物
最初の投稿 (実際)
最初の投稿
学習記録の更新
投稿された最後の更新 (実際)
投稿された最後の更新
QC基準を満たした最後の更新が送信されました
QC基準を満たした最後の更新が送信されました
最終確認日
最終確認日
詳しくは
本研究に関する用語
キーワード
追加の関連 MeSH 用語
その他の研究ID番号
その他の研究ID番号
- NPC-2026-biopsymodel
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
米国FDA規制機器製品の研究
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。