Fig. 1. Progressive change of ODI, VAS, and SF-36 during the follow-up period. Comparative progress of VAS, ODI, and SF-36 components is highlighted with different colors, from baseline to 12 months postoperatively. VAS, visual analogue scale; ODI, Oswestry Disabillity Index; SF-36, Medical Outcomes Study Short-form Questionnaire; PF, physical function; RP, role physical; BP, bodily pain; GH, general health; V, vitality; SF, social function; RE, role limitations due to emotional problems; MH, mental health.
