Main effect of variable | Stratum-specific effect of variable | Category | Adjusted OR (95% CI)* | p value† |
---|---|---|---|---|
One screw after ReveL for HV | ||||
No | 1.00 (reference) | |||
Yes | 0.55 (0.30–0.98) | 0.043 | ||
Additional surgical technique for HV | ||||
No | 1.00 (reference) | |||
Yes | 2.62 (1.24–5.52) | 0.011 | ||
Time period | ||||
2004–2007 | 1.00 (reference) | |||
2008–2013 | 1.50 (0.91–2.47) | 0.115 |