Table 3 Surgical data comparison between FA group (n = 101) and CTNav group (n = 91)

Total number of screws

502

450

–

Screws per patient

4 (4–8)

4 (4—8)

0.830

TLIF (yes:no)

40:61

50:41

0.043

Operative time (min)

145 (55–320)

155 (90–290)

0.060

Time per single screw (min)

5.7 (2.5–17.7)

6.3 (3.1–14.7)

0.154

Time per screw—1 level (min)

6.0 (2.5–17.7)

7.0 (4.0–14.7)

0.032

Time per screw—2 levels (min)

5.5 (3.2–10.2)

5.3 (4.0–7.7)

0.973

Time per screw—3 levels (min)

5.6 (3.0–7.6)

3.9 (3.1–6.4)

0.224

Complications (%)

7 (6.9)

5 (5.5)

0.771