Table 5 Binomial logistic regression results applied to the propensity score- matched cohort (n = 281, with bootstrapping)

Noprotocol

0.008

3.37

1.36–8.29 - 0.61

CSF fistula

0.03

3.32

1.12–9.81 -5.86

Duration of drainage

0.90

1.00

0.93–1.07

Number of times CSF sampled

< 0.001

1.63

1.25–2.13

Junior resident performing surgery

0.98

0.99

0.38–2.54

Senior resident performing surgery

0.86

1.10

0.37–3.21

Staff member performing surgery

Reference category