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Table 3: Proportion of patients at each follow-up visit by qualitative response
Procedure Location, Response Definition VNPS RMDI
Immediate 2 week 2 month 2 week 2 month
All patients (n = 218) (n = 171) (n = 119) (n = 171) (n = 119)
    >50% Improvement 66.10% 35.10% 39.50% 22.80% 35.30%
    Complete relief 41.06% 16.90% 17.50% – –
    No improvement/worsening 12.84% 30.40% 29.40% 36.80% 32.80%
Anterolateral^a (n = 69) (n = 50) (n = 32) (n = 50) (n = 32)
    >50% Improvement 71.01% 42.00% 37.50% 26.00% 31.30%
    Complete relief 50.65%^b 14.00% 15.60% – –
    No improvement/worsening 11.59% 32.00% 31.30% 44.00% 37.50%
Posterior^a (n = 149) (n = 121) (n = 87) (n = 121) (n = 87)
    >50% Improvement 63.76% 32.20% 40.20% 21.50% 36.80%
    Complete relief 36.69%^b 18.00% 18.20% – –
    No improvement/worsening 13.42% 29.80% 28.70% 33.90% 31.00%


↵a Comparison of anterolateral vs posterior approach P values >.05, unless indicated.


↵b Comparison of immediate complete relief between anterolateral and posterior approach, P value = .039.