A Study of Tislelizumab (BGB-A317) Plus Chemoradiotherapy Followed by Tislelizumab Monotherapy in Newly Diagnosed, Stage III Subjects With Locally Advanced, Unresectable Non-small Cell Lung Cancer

Overall Survival (OS)

Overall survival was defined as the time between randomization of treatment and death from any cause.

Time frame: Up to approximately 5 years; date of randomization to date of death from any cause.

Overall Survival at 24 Months

Overall survival was defined as the time between randomization of treatment and death from any cause.

Time frame: Up to approximately 24 months

Percentage of Participants Who Achieved a Best Overall Response of Complete Response or Partial Response

Overall Response was defined as percentage of participants who had a radiologic confirmed complete response (CR) or partial response (PR) according to Response Evaluation Criteria in Solid Tumors (RECIST 1.1) guidelines, between Day 1 of treatment and subsequent anti-cancer therapy, death or study discontinuation. Complete response was defined as the disappearance of all target lesions; partial response (PR) is defined as at least a 30% decrease in the sum of diameters of target lesions from baseline; stable disease-neither sufficient shrinkage to qualify for PR nor sufficient increase of lesions to qualify for progressive disease (PD).

Time frame: Up to approximately 5 years

Duration of Response

Duration of Response is defined as the time from the first occurrence of a documented objective response to the time of relapse, as determined by blinded independent central review per RECIST v1.1, or death from any cause, whichever comes first.

Time frame: Up to approximately 5 years

Percentage of Participants Alive and Progression-Free at 12 Months (APF12)

Progression-free survival was defined as the time from the date of randomization to the date of the first objectively tumor progression as assessed by the blinded independent central review per Response Evaluation Criteria in Solid Tumors (RECIST) Version 1.1 criteria (documented by radiological assessment) or death (any cause) on or prior to the clinical cut-off date, which ever occurred first

Time frame: Up to 12 months

Percentage of Participants Alive and Progression-free at 18 Months (APF18)

Progression-free survival was defined as the time from the date of randomization to the date of the first objectively tumor progression as assessed by the blinded independent central review per Response Evaluation Criteria in Solid Tumors (RECIST) Version 1.1 criteria (documented by radiological assessment) or death (any cause) on or prior to the clinical cut-off date, which ever occurred first

Time frame: Up to approximately 18 months

Time to Distant Metastasis (TTDM)

TTDM was defined as the time from the date of randomization until the first date of distant metastasis or death in the absence of distant metastasis. Distant metastasis was defined as any new lesion that is outside of the radiation field according to RECIST v1.1 or proven by biopsy.

Time frame: Up to approximately 5 years

Number of Participants With Treatment Emergent Adverse Events (TEAEs)

TEAEs include any adverse events (AEs) that had an onset date or a worsening in severity from baseline on or after the first dose of study drug up to 30 days following study drug discontinuation or initiation of new anticancer therapy, whichever occurred first. TEAEs also included all immune-related AEs recorded up to 90 days after the last dose of tislelizumab or placebo, regardless of whether or not the particpant started a new anticancer therapy. In addition, any serious AE with an onset date more than 30 days after the last dose of study drug that is assessed by the investigator as related to study drug were considered a TEAE."

Time frame: From first dose of study drug up to study withdrawal date of 26 June 2019; 15 days.

Number of Participants With Lung Cancer Symptoms Assessed by the Corresponding Domains of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-C30 (EORTC-QLQ-C30) and Lung-Cancer Specific QLQ-LC13

The EORTC QLQ-C30 is a 30-item, questionnaire assessing quality of life (QoL), psychosocial burden and physical symptoms. It is classified into 15 domains: 5 functional subscales (physical functioning, role functioning, emotional functioning, cognitive functioning, and social functioning); 3 multi-item symptom subscales (fatigue, nausea/vomiting, and pain); each item is measured on a 4 point response scale; (not at all, a little, quite a bit, very much), with the exception of the 2 items measuring global health and QoL, (measured on a 7-point response scale). Scores are linearly transformed to 0 to 100 scores. Scores vary from 0 (worst) to 100 (best) for the functional dimensions and GHS, and from 0 (best) to 100 (worst) for the symptom dimensions; higher scores = better QoL, better functioning, or more severe symptoms, respectively. The LC13 covers 13 typical symptoms of lung cancer patients, such as coughing, pain, dyspnea, sore mouth, peripheral neuropathy, and hair loss.

Time frame: Up to approximately 5 years

Percentage of Participants Who Would Have Continued on to Monotherapy Phase

Included the percentage of participants who would have received at least one dose of tislelizumab or placebo in the monotherapy phase before progression.

Time frame: Up to approximately 5 years