Features of Neer and Foster's multidirectional instability population
| Feature | No with symptom (N=40) for entire population |
|---|---|
| Solitary episode | 0 |
| More than one episode | 40 |
| Traumatic origin | 29 |
| Atraumatic origin | 7 |
| Direction anterior | 29 |
| Direction inferior | 40 |
| Direction posterior | 29 |
| Subluxation event | 38 |
| Dislocation event | 2 |
| Hyperlaxity | 17 |
| Presence of Bankart lesion | 5 |
The frequency with which different features of instability are found in Neer and Foster's classic 1980 paper on multidirectional instability—all had in common the same inferior capsular shift operation.