This is a clinical trial to study the safety and effectiveness of Autologous Muscle Derived Cells for Urinary Sphincter Repair (AMDC-USR) for the treatment of female stress urinary incontinence (SUI).

Study comparing intrasphincteric injection of AMDC-USR with placebo. Subjects unblinded after 12 months visits, but followed for 2 years. Subjects randomized to placebo could elect to receive open-label AMDC-USR after completing 12 months visit.

Inclusion Criteria:

• Female patient has primary symptoms of SUI, as confirmed by patient medical history and clinical symptoms, including a focused incontinence evaluation.

Exclusion Criteria:

• Patient has symptoms of pure urge incontinence as confirmed by basic evaluation of etiology from a patient medical history, including a focused incontinence history.
• Patient has symptoms of mixed urinary incontinence where urge incontinence is the predominant factor.
• Patient has had stress urinary incontinence symptoms less than 6 months prior to signing the informed consent.
• Patient has not previously attempted conservative treatment for at least 1 month prior to signing the informed consent. (Examples of conservative treatment include behavior modifications, bladder exercises, biofeedback, etc.)
• Patient has more than 2 episode of awakening to void during normal sleeping hours.
• Patient cannot be maintained on a stable dose and/or frequency of medication (including diuretics) known to affect lower urinary tract function, including but not limited to, anticholinergics, tricyclic antidepressants or alpha-adrenergic blockers, for at least 2 weeks prior to randomization or is likely to change during the course of the study.
• Patient is pregnant, lactating, or plans to become pregnant during the course of the study.
• Patient refuses to provide written informed consent.
• Patient is not at least 18 years of age.
• Patient is not available for the follow-up evaluations as required by the protocol.

150 subjects were enrolled and 143 subjects received at least 1 treatment of either AMDC-USR or placebo. Analysis population is based on 143 subjects that underwent at least 1 study treatment.

Adverse events were monitored from consent through study exit. Reporting groups are based on adverse events that occurred between initial blinded injection treatment and unblinding of subjects after 12-month follow-up.

Adverse events that occurred between initial blinded injection and unblinding of subjects after 12-month follow-up were compared between AMDC-USR and Placebo groups.

Planned study enrollment was 246 patients; due to limitations in study design related to the primary efficacy endpoint, enrollment was halted early at 150 subjects.