The primary efficacy analysis was the summary of change in slope of inverse serum creatinine for Placebo/Fabrazyme patients in the Intent to Treat (ITT) Population. It compared the placebo period slope with the Fabrazyme period slope.

ITT Population - Analysis compares results during the placebo period with those during the Fabrazyme period and includes only the 28 patients who were randomized to placebo in the AGAL-008-00 (NCT00074984) study; as such no formal sample size calculations were performed.

Summary of differences in slopes of eGFR comparing randomized placebo vs Fabrazyme patients by baseline eGFR subgroups. Differences in slopes are the placebo slope minus the Fabrazyme slope. Therefore, a negative difference indicates a greater decline in the placebo patients relative to the Fabrazyme patients.

ITT population. For subgroup Estimated Glomerular Filtration Rate (eGFR) >60, there were 9 placebo patients and 15 Fabrazyme patients. For subgroup eGFR ≤60, there were 19 placebo patients and 24 Fabrazyme patients. For randomized Fabrazyme patients, both the double-blind and open-label data was used.

Pre-Fabrazyme=baseline visit of AGAL-008-00 (NCT00074984) for Fabrazyme patients; assessment prior to open-label for placebo patients who transitioned to Fabrazyme in AGAL-008-00 (NCT00074984); assessment prior to first Fabrazyme infusion in AGAL02503 (NCT00081497) for placebo patients who did not transition to Fabrazyme in AGAL-008-00 (NCT00074984).

ITT population-67 patients had assessments at 6 and 12 months while 65 patients had assessments at 18 months in the open-label extension study.

Pre-Fabrazyme=baseline visit of AGAL-00-800 (NCT00074984) for Fabrazyme patients; assessment prior to open-label for placebo patients who transitioned to Fabrazyme in AGAL-008-00 (NCT00074984); assessment prior to first Fabrazyme infusion in AGAL02503 (NCT00081497) for placebo patients who did not transition to Fabrazyme in AGAL-008-00 (NCT00074984).

ITT population-67 patients had assessments at 6 and 12 months while 65 patients had assessments at 18 months in the open-label extension study.

Pre-Fabrazyme=baseline visit of AGAL00800 for Fabrazyme patients; assessment prior to open-label for placebo patients who transitioned to Fabrazyme in AGAL00800; assessment prior to first Fabrazyme infusion in AGAL02503 for placebo patients who did not transition to Fabrazyme in AGAL00800.

ITT population-64 patients had assessments at 6 and 18 months while 65 patients had assessments at 12 months in the open-label extension study.

Pre-Fabrazyme=baseline visit of AGAL-008-00 (NCT00074984) for Fabrazyme patients; assessment prior to open-label for placebo patients who transitioned to Fabrazyme in AGAL-008-00 (NCT00074984); assessment prior to first Fabrazyme infusion in AGAL02503 (NCT00081497) for placebo patients who did not transition to Fabrazyme in AGAL-008-00 (NCT00074984).

ITT population-62 patients had assessments at 6 months, 61 patients had assessments at 12 months, and 54 patients had assessments at 18 months in the open-label extension study.