EQ VAS scores reported preoperatively and 4-week postoperatively on a 0 to 100 scale, where 0 = maximal health-related problems and 100 = minimal health-related problems (total population; N = 252).

<p><i>P</i> < 0.0001 for difference between preoperative (52.9 ± 19.5) and 4-week postoperative scores (65.4 ± 18.6).</p

Back pain intensity (a) and leg pain intensity scores (b) reported preoperatively and postoperatively on a 10-cm visual analog scale (VAS), where 0 = minimal pain intensity or pain frequency and 10 = maximal pain intensity or pain frequency (total population; N = 252).

<p><i>P</i> < 0.0001 for difference between preoperative (B: 6.2 ± 2.3; L: 5.9 ± 2.8), and 4-week postoperative scores (B: 2.9 ± 2.2; L: 2.5 ± 2.6).</p

Five individual EQ-5D domains were reported preoperatively and 4-week postoperatively.

<p>At 4 weeks, the percentages of patients who reported no health-related problems increased from preoperative values in each domain: mobility (40.3% vs 11.1%), self-care (63.3% vs 54.3%), usual activities (23.4% vs 9.6%), pain/discomfort (14.9% vs 1.4%), and anxiety/depression (63.5% vs 49.5%).</p

Patient Demographics.

<p><i>MIS</i>, <i>minimally invasive surgery</i>.</p><p>Patient Demographics.</p

Mini-Open Surgical Approaches and Decompression and Fixation details.

<p>Mini-Open Surgical Approaches and Decompression and Fixation details.</p

Flow diagram of patient follow up.

<p>Flow diagram of patient follow up.</p

Intraoperative Surgery Results.

<p>Intraoperative Surgery Results.</p

Adverse Events (AEs) and serious adverse events (SAEs) in Total Population.

<p>Adverse Events (AEs) and serious adverse events (SAEs) in Total Population.</p

Oswestry Disability Index (ODI) scores reported preoperatively and 4-week postoperatively on a 0% to 100% scale, where 0% = minimal disability and 100% = maximal disability (total population; N = 252).

<p><i>P</i> < 0.0001 for difference between preoperative (45.5 ± 15.4) and 4-week postoperative scores (34.5 ± 17.3).</p

Ethical approvals.

<p>Ethical approvals.</p