Trial Outcomes & Findings for A Study of Atezolizumab and Tiragolumab Compared With Durvalumab in Participants With Locally Advanced, Unresectable Stage III Non-Small Cell Lung Cancer (NSCLC) (NCT NCT04513925)

A total of 829 participants with locally advanced, unresectable Stage III non-small cell lung cancer (NSCLC), who had previously received concurrent platinum-based chemoradiotherapy (CRT) without disease progression (PD), took part in the study at 189 investigative sites across 26 countries from 24 August 2020 to 31 July 2025.

Participants were randomized in a 1:1 ratio to receive either durvalumab or atezolizumab plus tiragolumab in the consolidation setting. The study is considered "Completed" as all the pre-planned study activities and analyses have been performed.

A Study of Atezolizumab and Tiragolumab Compared With Durvalumab in Participants With Locally Advanced, Unresectable Stage III Non-Small Cell Lung Cancer (NSCLC)

PFS was defined as the time from randomization to the first occurrence of PD, as determined by an IRF according to Response Evaluation Criteria in Solid Tumors, Version 1.1 (RECIST v1.1), or death from any cause, whichever occurred first. PD was defined as at least a 20% increase in the sum of diameters (SOD) of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 millimeters (mm) or unequivocal progression of existing non-target lesions. Kaplan-Meier (K-M) method was used to estimate median PFS.

PFS was defined as the time from randomization to the first occurrence of PD, as determined by an IRF according to RECIST v1.1, or death from any cause, whichever occurred first. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. K-M method was used to estimate median PFS.

OS was defined as the time from randomization to death from any cause. K-M method was used to estimate median OS.

PFS was defined as the time from randomization to the first occurrence of PD, as determined by the investigator according to RECIST v1.1, or death from any cause, whichever occurred first. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. K-M method was used to estimate median PFS.

ORR was defined as the percentage of participants who achieved an objective response (OR), characterized by a complete response (CR) or partial response (PR) on two consecutive occasions ≥ 4 weeks apart, as determined by an IRF according to RECIST v1.1. CR was defined as disappearance of all target and non-target lesion \& normalization of tumor marker level. Additionally, any lymph nodes (whether target or non-target) must have a reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. Percentages have been rounded off.

ORR was defined as the percentage of participants who achieved an OR, characterized by CR or PR on two consecutive occasions ≥ 4 weeks apart, as determined by the investigator according to RECIST v1.1. CR was defined as disappearance of all target and non-target lesions \& normalization of tumor marker level. Additionally, any lymph nodes (whether target or non-target) must have a reduction in short axis to \< 10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. Percentages have been rounded off.

DOR was defined as the time from the first occurrence of a confirmed OR, characterized by CR or PR, until the first date of PD, as determined by an IRF according to RECIST v1.1, or death from any cause, whichever occurred first. CR was defined as disappearance of all target and non-target lesions \& normalization of tumor marker level. Additionally, any lymph nodes (whether target or non-target) must have a reduction in short axis to \< 10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. Median DOR was estimated using the K-M method.

DOR was defined as the time from the first occurrence of a confirmed OR, characterized by CR or PR, until the first date of PD, as determined by the investigator according to RECIST v1.1, or death from any cause, whichever occurred first. CR was defined as disappearance of all target and non-target lesions, normalization of tumor marker level. Additionally, any lymph nodes (whether target or non-target) must have a reduction in short axis to \< 10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. Median DOR was estimated using the K-M method.

TTCD=time from randomization until first confirmed clinically meaningful deterioration (CCMD) on each respective score. EORTC QLQ-LC13 is a lung cancer-specific instrument consisting of 13 questions: one multiple-item scale assessing dyspnoea (3 items), and 10 single items assessing cough, hemoptysis, sore mouth, dysphagia, peripheral neuropathy, alopecia, pain in chest, pain in arm or shoulder, pain in other parts, pain medication. Cough scored on a 4-point scale: 1=Not at all, 2=A little, 3=Quite a bit, 4=Very much. Scores were linearly transformed to score range of 0-100. High symptom score=high level of symptom severity. CCMD=increase from baseline (≥10 points) in a symptom score, held for at least two consecutive assessments or an initial clinically meaningful increase above baseline followed by death from any cause within 6 weeks. K-M method was used to estimate median TTCD.

TTCD=time from randomization until first CCMD on each respective score. EORTC QLQ-LC13 is a lung cancer-specific instrument consisting of 13 questions: one multiple-item scale assessing dyspnoea (3 items), and 10 single items assessing cough, hemoptysis, sore mouth, dysphagia, peripheral neuropathy, alopecia, pain in chest, pain in arm or shoulder, pain in other parts, pain medication. Dyspnoea was scored on a 4-point scale: 1=Not at all, 2=A little, 3=Quite a bit, 4=Very much. Scores were linearly transformed to score range of 0-100. High symptom score=high level of symptom severity. CCMD=increase from baseline (≥10 points) in a symptom score, held for at least two consecutive assessments or an initial clinically meaningful increase above baseline followed by death from any cause within 6 weeks. K-M method was used to estimate median TTCD.

TTCD=time from randomization until first CCMD on each respective score. EORTC QLQ-LC13 is a lung cancer-specific instrument consisting of 13 questions: one multiple-item scale assessing dyspnoea (3 items), and 10 single items assessing cough, hemoptysis, sore mouth, dysphagia, peripheral neuropathy, alopecia, pain in chest, pain in arm or shoulder, pain in other parts, pain medication. Chest pain was scored on a 4-point scale: 1=Not at all, 2=A little, 3=Quite a bit, 4=Very much. Scores were linearly transformed to score range of 0-100. High symptom score=high level of symptom severity. CCMD=increase from baseline (≥10 points) in a symptom score, held for at least two consecutive assessments or an initial clinically meaningful increase above baseline followed by death from any cause within 6 weeks. K-M method was used to estimate median TTCD.

TTCD=time from randomization until first CCMD on each respective score. EORTC QLQ-C30 is cancer-specific instrument consisting of 30 questions to evaluate 5 aspects of participant functioning (physical, emotional, role, cognitive, \& social), 3 symptom scales (fatigue, nausea, vomiting, \& pain), GHS/QoL, \& 6 single items (dyspnea, insomnia, appetite loss, constipation, diarrhea \& financial difficulties). GHS/QoL questions were scored on 7-point scale with scores ranging from 1=Very poor to 7=Excellent. Scores were linearly transformed to a score range of 0-100. High score for GHS/QoL scale=better health-related quality-of-life (HRQoL). CCMD=decrease from baseline (≥10 points) in GHS/QoL scale score, held for at least 2 consecutive assessments/initial clinically meaningful decrease above baseline followed by death within 6 weeks. K-M method was used to estimate median TTCD.

TTCD=time from randomization until first CCMD on each respective score. EORTC QLQ-C30 is cancer-specific instrument consisting of 30 questions to evaluate 5 aspects of participant functioning (physical, emotional, role, cognitive, \& social), 3 symptom scales (fatigue, nausea, vomiting, \& pain), GHS/QoL, and 6 single items (dyspnea, insomnia, appetite loss, constipation, diarrhea \& financial difficulties). PF was scored on a 4-point scale: 1=Not at all, 2=A little, 3=Quite a bit, 4=Very much. Scores were linearly transformed to a score range of 0-100. High score for PF=high/healthy level of functioning. CCMD=decrease from baseline (≥10 points) in PF score, held for at least 2 consecutive assessments or initial clinically meaningful decrease above baseline followed by death within 6 weeks. K-M method was used to estimate median TTCD.

OS was defined as the time from randomization to death from any cause. K-M method was used to estimate median OS.

PFS was defined as the time from randomization to the first occurrence of PD, as determined by the investigator according to RECIST v1.1, or death from any cause, whichever occurred first. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. K-M method was used to estimate median PFS.

ORR was defined as the percentage of participants who achieved an OR, characterized by CR or PR on two consecutive occasions ≥ 4 weeks apart, as determined by an IRF according to RECIST v1.1. CR was defined as disappearance of all target and non-target lesions, normalization of tumor marker level. Additionally, any lymph nodes (whether target or non-target) must have a reduction in short axis to \< 10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. Percentages have been rounded off.

ORR was defined as the percentage of participants who achieved an OR, characterized by a CR or PR on two consecutive occasions ≥ 4 weeks apart, as determined by the investigator according to RECIST v1.1. CR was defined as disappearance of all target and non-target lesions, normalization of tumor marker level. Additionally, any lymph nodes (whether target or non-target) must have a reduction in short axis to \< 10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. Percentages have been rounded off.

DOR was defined as the time from the first occurrence of a confirmed OR, characterized by CR or PR, until the first date of PD, as determined by an IRF according to RECIST v1.1, or death from any cause, whichever occurred first. CR was defined as disappearance of all target and non-target lesions, normalization of tumor marker level. Additionally, any lymph nodes (whether target or non-target) must have a reduction in short axis to \< 10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. Median DOR was estimated using the K-M method.

DOR was defined as the time from the first occurrence of a confirmed OR, characterized by CR or PR, until the first date of PD, as determined by the investigator according to RECIST v1.1, or death from any cause, whichever occurred first. CR was defined as disappearance of all target and non-target lesions, normalization of tumor marker level. Additionally, any lymph nodes (whether target or non-target) must have a reduction in short axis to \< 10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. Median DOR was estimated using the K-M method.

TTCD=time from randomization until first CCMD on each respective score. EORTC QLQ-LC13 is a lung cancer-specific instrument consisting of 13 questions: one multiple-item scale assessing dyspnoea (3 items), and 10 single items assessing cough, hemoptysis, sore mouth, dysphagia, peripheral neuropathy, alopecia, pain in chest, pain in arm or shoulder, pain in other parts, pain medication. Cough was scored on a 4-point scale: 1=Not at all, 2=A little, 3=Quite a bit, 4=Very much. Scores were linearly transformed to score range of 0-100. High symptom score=high level of symptom severity. CCMD=increase from baseline (≥10 points) in a symptom score, held for at least two consecutive assessments or an initial clinically meaningful increase above baseline followed by death from any cause within 6 weeks. K-M method was used to estimate median TTCD.

TTCD=time from randomization until first CCMD on each respective score. EORTC QLQ-LC13 is a lung cancer-specific instrument consisting of 13 questions: one multiple-item scale assessing dyspnoea (3 items), and 10 single items assessing cough, hemoptysis, sore mouth, dysphagia, peripheral neuropathy, alopecia, pain in chest, pain in arm or shoulder, pain in other parts, pain medication. Dyspnoea was scored on a 4-point scale: 1=Not at all, 2=A little, 3=Quite a bit, 4=Very much. Scores were linearly transformed to score range of 0-100. High symptom score=high level of symptom severity. CCMD=increase from baseline (≥10 points) in a symptom score, held for at least two consecutive assessments or an initial clinically meaningful increase above baseline followed by death from any cause within 6 weeks. K-M method was used to estimate median TTCD.

TTCD=time from randomization until first CCMD on each respective score. EORTC QLQ-LC13 is a lung cancer-specific instrument consisting of 13 questions: one multiple-item scale assessing dyspnoea (3 items), and 10 single items assessing cough, hemoptysis, sore mouth, dysphagia, peripheral neuropathy, alopecia, pain in chest, pain in arm or shoulder, pain in other parts, pain medication. Chest pain was scored on a 4-point scale: 1=Not at all, 2=A little, 3=Quite a bit, 4=Very much. Scores were linearly transformed to score range of 0-100. High symptom score=high level of symptom severity. CCMD=increase from baseline (≥10 points) in a symptom score, held for at least two consecutive assessments or an initial clinically meaningful increase above baseline followed by death from any cause within 6 weeks. K-M method was used to estimate median TTCD.

TTCD=time from randomization until first CCMD on each respective score. EORTC QLQ-C30 is cancer-specific instrument consisting of 30 questions to evaluate 5 aspects of participant functioning (physical, emotional, role, cognitive, \& social), 3 symptom scales (fatigue, nausea, vomiting, \& pain), GHS/QoL, and 6 single items (dyspnea, insomnia, appetite loss, constipation, diarrhea \& financial difficulties). GHS/QoL questions were scored on 7-point scale with scores ranging from 1=Very poor to 7=Excellent. Scores were linearly transformed to a score range of 0-100. High score for GHS/QoL scale=better HRQoL. CCMD=decrease from baseline (≥10 points) in GHS/QoL scale score, held for at least 2 consecutive assessments or initial clinically meaningful decrease above baseline followed by death within 6 weeks. K-M method was used to estimate median TTCD.

TTCD=time from randomization until first CCMD on each respective score. EORTC QLQ-C30 is cancer-specific instrument consisting of 30 questions to evaluate 5 aspects of participant functioning (physical, emotional, role, cognitive, \& social), 3 symptom scales (fatigue, nausea, vomiting, \& pain), GHS/QoL, and 6 single items (dyspnea, insomnia, appetite loss, constipation, diarrhea \& financial difficulties). PF was scored on a 4-point scale: 1=Not at all, 2=A little, 3=Quite a bit, 4=Very much. Scores were linearly transformed to a score range of 0-100. High score for PF=high/healthy level of functioning. CCMD=decrease from baseline (≥10 points) in PF score, held for at least 2 consecutive assessments or initial clinically meaningful decrease above baseline followed by death within 6 weeks. K-M method was used to estimate median TTCD.

PFS rate at 12, 18, and 24 months was defined as the percentage of participants who did not experience PD or death from any cause, as determined by an IRF, at 12, 18, and 24 months. PFS was defined as the time from randomization to the first occurrence of PD, as determined by an IRF according to RECIST v1.1, or death from any cause, whichever occurred first. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. K-M method was used to estimate median PFS rate. Percentages have been rounded off.

PFS rate at 12, 18, and 24 months was defined as the percentage of participants who did not experience PD or death from any cause, as determined by the investigator, at 12, 18, and 24 months. PFS was defined as the time from randomization to the first occurrence of PD, as determined by the investigator according to RECIST v1.1, or death from any cause, whichever occurred first. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. K-M method was used to estimate median PFS rate. Percentages have been rounded off.

OS rate at months 12, 24, 36 and 48 was defined as percentage of participants who did not experience death from any cause at the specified timepoints. OS was defined as the time from randomization to death from any cause. K-M method was used to estimate OS rate. Percentages have been rounded off.

TTDM was defined as the time from the date of randomization until the date of first documented distant metastasis, as assessed by investigator according to RECIST v1.1, or death, whichever occurred first. Distant metastasis was defined as any new lesion that was outside of the radiation field. K-M method was used to estimate median TTDM.

PFS rate at 12, 18, and 24 months was defined as the percentage of participants who did not experience PD or death from any cause, as determined by an IRF, at 12, 18, and 24 months. PFS was defined as the time from randomization to the first occurrence of PD, as determined by an IRF according to RECIST v1.1, or death from any cause, whichever occurred first. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. K-M method was used to estimate PFS rate. Percentages have been rounded off.

PFS rate at 12, 18, and 24 months was defined as the percentage of participants who did not experience PD or death from any cause, as determined by the investigator, at 12, 18, and 24 months. PFS was defined as the time from randomization to the first occurrence of PD, as determined by the investigator according to RECIST v1.1, or death from any cause, whichever occurred first. PD was defined as at least a 20% increase in the SOD of target lesions, taking as reference the smallest SOD at prior timepoints (including baseline). Additionally, the SOD must also demonstrate an absolute increase of ≥ 5 mm or unequivocal progression of existing non-target lesions. K-M method was used to estimate PFS rate. Percentages have been rounded off.

OS rate at months 12, 24, 36 and 48 was defined as percentage of participants who did not experience death from any cause at the specified timepoints. OS was defined as the time from randomization to death from any cause. K-M method was used to estimate OS rate. Percentages have been rounded off.

TTDM was defined as the time from the date of randomization until the date of first documented distant metastasis, as assessed by investigator according to RECIST v1.1, or death, whichever occurred first. Distant metastasis was defined as any new lesion that was outside of the radiation field. K-M method was used to estimate median TTDM.

An AE was defined as any untoward medical occurrence in a clinical investigation participant administered a pharmaceutical product, regardless of causal attribution. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal product.

CRS=supraphysiologic response following administration of any immune therapy that results in activation/engagement of endogenous or infused T cells and/or other immune effector cells. Symptoms may be progressive, including fever at onset, and may also include hypotension, capillary leak (hypoxia), and end-organ dysfunction.