# Safety and Efficacy of SA4Ag Vaccine in Adults Having Elective Open Posterior Spinal Fusion Procedures With Multilevel Instrumentation

> **NCT02388165** · PHASE2 · TERMINATED · sponsor: **Pfizer** · enrollment: 3450 (actual)

## Conditions studied

- Staphylococcal Vaccine

## Interventions

- **BIOLOGICAL:** Staphylococcus aureus 4-Antigen (SA4Ag) Vaccine
- **OTHER:** Placebo

## Key facts

- **NCT ID:** NCT02388165
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** TERMINATED
- **Start date:** 2015-07-02
- **Primary completion:** 2019-06-26
- **Final completion:** 2019-06-27
- **Target enrollment:** 3450 (ACTUAL)
- **Why stopped:** Study terminated by sponsor
- **Last updated:** 2021-01-05


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT02388165

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT02388165, "Safety and Efficacy of SA4Ag Vaccine in Adults Having Elective Open Posterior Spinal Fusion Procedures With Multilevel Instrumentation". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT02388165. Licensed CC0.

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