Is the postoperative pedicle screw position after dorsal instrumentation with or without intraoperative cone beam CT imaging worse in patients with obesity than in normal-weight patients?

Table 2 Demographics and pedicle screw position in the SG1 and CG1 subgroups

	Number of patients	Age	Male/Female	Number of pedicle screws	Type A + B	Type C − E
Subgroup 1 of SG1 (BMI 30–35 kg/m²)	10	65.1 ± 23.7 [27–92]	6/4	68	57 (83.8%)	11 (16.2%)
Subgroup 2 of SG1 (BMI > 35 kg/m²)	8	63.0 ± 13.5 [42–84]	4/4	60	50 (83.3%)	10 (16.7%)
Subgroup 1 of CG1 (BMI 30–35 kg/m²)	17	65.8 ± 10.8 [38–81]	11/6	92	72 (78.3%)	20 (21.7%)
Subgroup 2 of CG1 (BMI > 35 kg/m²)	5	70.2 ± 10.1 [65–85]	3/2	42	30 (71.4%)	12 (28.6%)

The mean values ± standard deviations [range] and absolute and relative frequencies are shown. Pedicle screw position was assessed using the Gertzbein–Robbins classification [16] modified from Schatlo et al. [17]

ISSN: 1749-799X