Safety and Efficacy of Pirfenidone in Patients With Idiopathic Pulmonary Fibrosis

Mean Change in Percent Predicted Forced Vital Capacity (FVC) as measured from baseline to week 72. It is calculated as the simple difference between baseline Percent Predicted FVC measurements and week 72 Percent Predicted FVC measurements.

Time frame: Baseline to week 72

Population: A modified intent-to-treat population of all randomized patients who received any amount of study drug is the primary population for efficacy and safety analyses. Missing FVC data due to death were assigned the worst rank and missing FVC data due to reasons other than death were imputed using the SSD method.

Based on the change in baseline percent predicted FVC at week 72, patients were assigned to 1 of 5 categories: mild decline (\<10% but \>=0% decline), moderate decline (\<20% but \>=10% decline), severe decline (\>=20% decline), mild improvement (\>0% but \<10% improvement), or moderate improvement (\>=10% improvement). Those who died or had a lung transplant before Week 72 were included in the severe decline category. The results indicate the number of patients who experience Categorical Change in Percent Predicted Forced Vital Capacity.

Time frame: Baseline to week 72

Population: A modified intent-to-treat population of all randomized patients who received any amount of study drug is used as the primary population for all efficacy and safety analyses. Missing data were imputed by the SSD method if the patient was alive and imputed to 0% if the patient died before the protocol-specified time point.

The mean change from baseline to week 72 in Dyspnea score was measured by the University of San Diego Shortness of Breath Questionnaire (UCSD SOBQ). The SOBQ is used to assess shortness of breath with various activities of daily living (for example, brushing ones teeth or mowing the lawn). Patients rated the severity of their shortness of breath experienced on an average day during the past week on a 6 point scale (0 to 5),with 0= not at all breathless, 4= severely breathless and 5= Maximally or unable to do because of breathlessness.

Time frame: Baseline to Week 72

Population: A modified intent-to-treat population of all randomized patients who received any amount of study drug is used as the primary population for efficacy and safety analyses.~Missing data were imputed by the SSD method if the patient was alive and imputed to a score of 120 if the patient died before the protocol-specified time point.

The change from baseline to week 72 in Percent Predicted Hemoglobin (Hb)-Corrected Carbon Monoxide Diffusing Capacity (DLco) of the Lungs. It is calculated as the simple difference between baseline DLco measurements and week 72 DLco measurements.

Time frame: Baseline to Week 72

Population: A modified intent-to-treat population of all randomized patients who received any amount of study drug is used as the primary population for efficacy and safety analyses. Missing data were imputed by the SSD method if the patient was alive and imputed to 0% if the patient died before the protocol-specified time point.

The change from Baseline to week 72 in distance walked during the 6-Minute Walk Test. This measure was calculated as the simple difference between baseline distanced walked over 6 minutes and week 72 distance walked over 6 minutes as measured in meters (m).

Time frame: Baseline to Week 72

Population: A modified intent-to-treat population of all randomized patients who received any amount of study drug is used as the primary population for efficacy and safety analyses. Missing data were imputed by the SSD method if the patient was alive and imputed to 0 meters if the patient had died before the protocol-specified time point.

The change from baseline to week 72 in worst oxygen saturation during the 6-Minute Walk Test as measure by Pulse Oximetry (SpO2) Level. It is calculated as the simple difference between baseline SpO2 measurements and week 72 SpO2 measurements.

Time frame: Baseline to Week 72

Population: A modified intent-to-treat population of all randomized patients who received any amount of study drug is used as the primary population for efficacy and safety analyses. Missing data were imputed by the SSD method if the patient was alive and imputed to 83% if the patient died before the protocol-specified time point.

Progression is defined as the first occurrence of a 10% absolute decline from baseline in percent predicted Forced Vital Capacity, a 15% absolute decline from baseline in percent predicted hemoglobin(Hgb)-corrected carbon monoxide diffusing capacity (DLco), or, death.

Time frame: Baseline to Week 72

Population: A modified intent-to-treat population of all randomized patients who received any amount of study drug is used as the primary population for efficacy and safety analyses.

Worsening of IPF was defined by the occurrence of any of the following events: Acute IPF exacerbation, IPF-related death, Lung transplantation, or Respiratory hospitalization.

Time frame: Time to acute IPF exacerbation, IPF-related death, lung transplant or respiratory hospitalization, whichever comes first.

Population: A modified intent-to-treat population of all randomized patients who received any amount of study drug is used as the primary population for efficacy and safety analyses.