Table 2 Generalized Estimating Equation Models of the Primary Outcome (N = 175)

Group

0.95

0.34 to 2.69

0.929

0.71

0.34 to 1.49

0.366

DSS

1.07

0.67 to 1.71

0.784

1.22

0.87 to 1.72

0.252

Preprocedural infection

2.07

0.86 to 5.01

0.107

1.67

0.72 to 3.87

0.232

Age (10 years)

0.90

0.64 to 1.26

0.523

NA

Sex

0.44

0.21 to 0.90

0.024^a

NA

Diffusion dysfunction

1.18

0.79 to 1.75

0.428

NA

Number of previous WLLs

0.96

0.79 to 1.16

0.643

NA

Surgery year^b

0.98

0.91 to 1.07

0.702

NA

Anesthesia duration (30 min)

1.16

1.03 to 1.31

0.024^a

NA