A Phase III Study of Radium-223 Dichloride in Patients With Symptomatic Hormone Refractory Prostate Cancer With Skeletal Metastases

The time from the first study drug administration to when ALP progression was observed, defined as: 1) In subjects with no ALP decline from baseline; a greater than or equal to 25% increase from baseline value and an increase in absolute value of greater than or equal to 2 ng/mL, at least 12 weeks from baseline; 2) In subjects with initial ALP decline from baseline; the time from start of treatment to first ALP increase that is greater than or equal to 25% increase and at least 2 ng/mL above the nadir value, which was confirmed by a second value obtained 3 or more weeks later

ALP levels were measured in participants' blood at Week 12 and compared to baseline values. A confirmed total ALP response (either >/= 30% or 50% reduction from baseline) was confirmed by a second total ALP value approximately 4 weeks later.

ALP levels were measured in participants' blood at EOT (Week 24) and compared to baseline values. A confirmed total ALP response (>/=50% reduction from baseline) was confirmed by a second total ALP value approximately 4 weeks later.

The return of total ALP value to within normal range at 12 weeks in 2 consecutive measurements (at least 2 weeks apart) after start of treatment in subjects who had ALP above the upper limit of normal (ULN) at baseline.

ALP level was measured in subject's blood at Week 12 and the percent change from the baseline value was calculated (ALP level at week 12 minus ALP level at baseline)/(ALP level at baseline)*100

ALP level was measured in participant's blood up to week 12 and the maximum percent decrease from the baseline up to Week 12 value was calculated as the minimum value of [(ALP level up to week 12 minus ALP level at baseline)/(ALP level at baseline)*100] by participant, and set to zero if no decrease from baseline.

ALP level was measured in subject's blood at EOT (Week 24) and the percent change from the baseline value was calculated (ALP level at EOT minus ALP level at baseline)/(ALP level at baseline)*100

ALP level was measured in participant's blood during the 24 week treatment (up to EOT) and the maximum percent decrease from baseline during the 24 week treatment value was calculated as the minimum value of [(ALP level up to week 24 minus ALP level at baseline)/(ALP level at baseline)*100] by participant, and set to zero if no decrease from baseline.

The time from the first study drug administration to when PSA progression was observed, defined as: 1) In subjects with no PSA decline from baseline; a greater than or equal to 25% increase from baseline value and an increase in absolute value of greater than or equal to 2 ng/mL, at least 12 weeks from baseline; 2) In subjects with initial PSA decline from baseline; the time from start of treatment to first PSA increase that is greater than or equal to 25% increase and at least 2 ng/mL above the nadir value, which was confirmed by a second value obtained 3 or more weeks later

PSA levels were measured in participants' blood at Week 12 and compared to baseline values. A confirmed PSA response (>/=50% reduction from baseline) was confirmed by a second PSA value approximately 4 weeks later.

PSA levels were measured in participants' blood at EOT (Week 24) and compared to baseline values. A confirmed PSA response (>/=50% reduction from baseline) was confirmed by a second PSA value approximately 4 weeks later.

PSA level was measured in subject's blood at Week 12 and the percent change from the baseline value was calculated (PSA level at week 12 minus PSA level at baseline)/(PSA level at baseline)*100

PSA level was measured in participant's blood up to Week 12 and the maximum percent decrease from the baseline up to week 12 value was calculated as the minimum value of [(PSA level up to week 12 minus PSA level at baseline)/(PSA level at baseline)*100] by participant, and set to zero if no decrease from baseline.

PSA level was measured in subject's blood at EOT (Week 24) and the percent change from the baseline value was calculated (PSA level at EOT minus PSA level at baseline)/(PSA level at baseline)*100

PSA level was measured in participant's blood during the 24 week treatment (up to EOT) and the maximum percent decrease from baseline during the 24 Week treatment value was calculated as the minimum value of [(PSA level up to week 24 minus PSA level at baseline)/(PSA level at baseline)*100] by participant, and set to zero if no decrease from baseline.

A skeletal related event is the use of external beam radiotherapy to relieve skeletal symptoms or the occurrence of new symptomatic pathological bone fractures (vertebral or non-vertebral) or the occurrence of spinal cord compression or a tumour related orthopaedic surgical intervention. For all other events, the start date of the event/medication/therapy was used as the time of the event. If an event has not occurred at the time of the analysis or the patient has been lost to follow-up, the time-to-event variables will be censored at the last disease assessment date.

The start date of therapy was used as the time of the event. If an event has not occurred at the time of the analysis or the patient has been lost to follow-up, the time-to-event variables will be censored at the last disease assessment date.

The start date of the radioisotopes was used as the time of the event. If an event has not occurred at the time of the analysis or the patient has been lost to follow-up, the time-to-event variables will be censored at the last disease assessment date.

The start date of the event was used as the time of the event. If an event has not occurred at the time of the analysis or the patient has been lost to follow-up, the time-to-event variables will be censored at the last disease assessment date.

The start date of the intervention was used as the time of the event. If an event has not occurred at the time of the analysis or the patient has been lost to follow-up, the time-to-event variables will be censored at the last disease assessment date.

The start date of the compression was used as the time of the event. If an event has not occurred at the time of the analysis or the patient has been lost to follow-up, the time-to-event variables will be censored at the last disease assessment date.

The start date of the treatment was used as the time of the event. If an event has not occurred at the time of the analysis or the patient has been lost to follow-up, the time-to-event variables will be censored at the last disease assessment date.

ECOG scores were: 0 = fully active; 1 = restricted in physically strenuous activity; 2 = ambulatory and capable of all self-care but unable to work; 3 = capable of only limited self-care; 4 = completely disabled; 5 = death. The visit at which a 2-point or more deterioration in PS was observed was the time of the event. ECOG was assessed at every visit. If a marked deterioration in PS has not occurred at the time of the analysis or the participant was lost to follow-up, the time-to-event variables were censored at the last assessment date.