NCT03043872 · OUTCOME
Number of Patients With ADA Response to Tremelimumab in the Global Cohort
Durvalumab ± Tremelimumab in Combination With Platinum Based Chemotherapy in Untreated Extensive-Stage Small Cell Lung Cancer (CASPIAN) · Source last updated 2026-07-16
Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.
- Measure
- COUNT_OF_PARTICIPANTS
- Unit
- Participants
- Interval / dispersion
- Not reported
- Time frame
- Samples were collected on Day 1 (Week 0), Week 12 and at 3 months after the last dose of IP (ie, tremelimumab). Assessed at the global cohort final analysis DCO (27 January 2020).
What was measured
Serum sampling for ADA assessment was conducted utilizing a tiered approach (screen, confirm, titer). ADA positive post-baseline only was also referred to as treatment-induced ADA. Treatment-emergent ADA (or ADA incidence) was defined as the sum of treatment-induced ADA and treatment-boosted ADA (defined as baseline positive ADA titer that was boosted to ≥4-fold during the study period). Persistently positive was defined as having ≥2 post-baseline ADA positive measurements with ≥16 weeks between first and last positive, or an ADA positive result at the last available assessment. Transiently positive was defined as having ≥1 post-baseline ADA positive measurement and not fulfilling the conditions for persistently positive. The presence of nAb was tested for all ADA positive samples. Results are reported as number of patients with ADA responses to tremelimumab for each indicated category.
Analysis population: The global ADA evaluable patients included those in the global safety analysis set who had non-missing baseline ADA and at least 1 non-missing post-baseline ADA result. ADA for tremelimumab was performed for the D + T + EP group only. The denominator was tremelimumab ADA evaluable patients.
Groups in this outcome
Global Cohort: D + T + EP
During Chemotherapy:
Patients received durvalumab (D) 1500 mg in combination with tremelimumab (T) 75 mg IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). For chemotherapy (EP), patients received etoposide (80-100 mg/m\^2) with either carboplatin (area under the curve 5-6) or cisplatin (75-80 mg/m\^2) IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9).
Post-Chemotherapy:
Patients then continued to receive durvalumab 1500 mg IV infusion Q4W from Week 12 until PD, unless there was unacceptable toxicity, withdrawal of consent, or another discontinuation criterion was met. Patients also received an additional dose of tremelimumab 75 mg IV infusion post-chemotherapy (in combination with durvalumab) at Week 16 if they completed all 4 doses of durvalumab + tremelimumab during chemotherapy.
Group identifiers and denominators belong to this outcome only. They may differ in another outcome or in safety reporting.
Analysis denominator · Participants
| Group | Source count |
|---|
| Global Cohort: D + T + EP | 178 |
|---|
Reported measurements
ADA positive at any visit (ADA prevalence)
Values in Participants · Interval/dispersion: Not reported| Group | Value | Spread | Lower | Upper | Comment |
|---|
| Global Cohort: D + T + EP | 11 | Not reported | Not reported | Not reported | Not reported |
|---|
Treatment-emergent ADA positive (ADA incidence)
Values in Participants · Interval/dispersion: Not reported| Group | Value | Spread | Lower | Upper | Comment |
|---|
| Global Cohort: D + T + EP | 5 | Not reported | Not reported | Not reported | Not reported |
|---|
Treatment-boosted ADA
Values in Participants · Interval/dispersion: Not reported| Group | Value | Spread | Lower | Upper | Comment |
|---|
| Global Cohort: D + T + EP | 0 | Not reported | Not reported | Not reported | Not reported |
|---|
Treatment-induced ADA (ADA positive post-baseline only)
Values in Participants · Interval/dispersion: Not reported| Group | Value | Spread | Lower | Upper | Comment |
|---|
| Global Cohort: D + T + EP | 5 | Not reported | Not reported | Not reported | Not reported |
|---|
ADA positive at baseline only
Values in Participants · Interval/dispersion: Not reported| Group | Value | Spread | Lower | Upper | Comment |
|---|
| Global Cohort: D + T + EP | 6 | Not reported | Not reported | Not reported | Not reported |
|---|
ADA positive post-baseline and positive at baseline
Values in Participants · Interval/dispersion: Not reported| Group | Value | Spread | Lower | Upper | Comment |
|---|
| Global Cohort: D + T + EP | 0 | Not reported | Not reported | Not reported | Not reported |
|---|
Persistently positive
Values in Participants · Interval/dispersion: Not reported| Group | Value | Spread | Lower | Upper | Comment |
|---|
| Global Cohort: D + T + EP | 4 | Not reported | Not reported | Not reported | Not reported |
|---|
Transiently positive
Values in Participants · Interval/dispersion: Not reported| Group | Value | Spread | Lower | Upper | Comment |
|---|
| Global Cohort: D + T + EP | 1 | Not reported | Not reported | Not reported | Not reported |
|---|
nAb positive at any visit
Values in Participants · Interval/dispersion: Not reported| Group | Value | Spread | Lower | Upper | Comment |
|---|
| Global Cohort: D + T + EP | 2 | Not reported | Not reported | Not reported | Not reported |
|---|
Complete source fields
- classes
- title
- ADA positive at any visit (ADA prevalence)
- title
- Treatment-emergent ADA positive (ADA incidence)
- title
- Treatment-boosted ADA
- title
- Treatment-induced ADA (ADA positive post-baseline only)
- title
- ADA positive at baseline only
- title
- ADA positive post-baseline and positive at baseline
- title
- Persistently positive
- title
- Transiently positive
- title
- nAb positive at any visit
- description
- Serum sampling for ADA assessment was conducted utilizing a tiered approach (screen, confirm, titer). ADA positive post-baseline only was also referred to as treatment-induced ADA. Treatment-emergent ADA (or ADA incidence) was defined as the sum of treatment-induced ADA and treatment-boosted ADA (defined as baseline positive ADA titer that was boosted to ≥4-fold during the study period). Persistently positive was defined as having ≥2 post-baseline ADA positive measurements with ≥16 weeks between first and last positive, or an ADA positive result at the last available assessment. Transiently positive was defined as having ≥1 post-baseline ADA positive measurement and not fulfilling the conditions for persistently positive. The presence of nAb was tested for all ADA positive samples. Results are reported as number of patients with ADA responses to tremelimumab for each indicated category.
- groups
- description
- During Chemotherapy:
Patients received durvalumab (D) 1500 mg in combination with tremelimumab (T) 75 mg IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). For chemotherapy (EP), patients received etoposide (80-100 mg/m\^2) with either carboplatin (area under the curve 5-6) or cisplatin (75-80 mg/m\^2) IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9).
Post-Chemotherapy:
Patients then continued to receive durvalumab 1500 mg IV infusion Q4W from Week 12 until PD, unless there was unacceptable toxicity, withdrawal of consent, or another discontinuation criterion was met. Patients also received an additional dose of tremelimumab 75 mg IV infusion post-chemotherapy (in combination with durvalumab) at Week 16 if they completed all 4 doses of durvalumab + tremelimumab during chemotherapy.
- id
- OG000
- title
- Global Cohort: D + T + EP
- param Type
- COUNT_OF_PARTICIPANTS
- population Description
- The global ADA evaluable patients included those in the global safety analysis set who had non-missing baseline ADA and at least 1 non-missing post-baseline ADA result. ADA for tremelimumab was performed for the D + T + EP group only. The denominator was tremelimumab ADA evaluable patients.
- reporting Status
- POSTED
- time Frame
- Samples were collected on Day 1 (Week 0), Week 12 and at 3 months after the last dose of IP (ie, tremelimumab). Assessed at the global cohort final analysis DCO (27 January 2020).
- title
- Number of Patients With ADA Response to Tremelimumab in the Global Cohort
- type
- SECONDARY
- unit Of Measure
- Participants
Download exact source JSON → · Snapshot ctgov-results-191f4516d4760045304b24a0
Preserved source evidence · Not medical advice
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