Higher Improvement in Oswestry Disability Index Is Appropriate to Increase Satisfaction of Frail Patients After Lumbar Fusion Surgery

Frail patients with lower preoperative ODI were significantly more likely to experience postoperative satisfaction, whereas nonfrail/prefrail patients with higher preoperative ODI were significantly more likely to experience postoperative satisfaction. Among frail patients, relative ODI improvement ≥67% or postoperative ODI ≤17 indicated patient satisfaction; in nonfrail/prefrail patients, relative ODI improvement ≥55% or postoperative ODI ≤26 indicated patient satisfaction.