Table 3. Results of the linear regression analysis investigating possible predictors for worst postoperative pain since surgery.

Predictor Variable	p—Value	β	Lower bound	Upper bound
Age¥	< 0.001	-0.176	-0.714	-0.319
Existence of preoperative chronic pain	< 0.001	0.157	0.493	1.249
Sexª	0.005	-0.095	-0.888	-0.158
Anesthetic technique*	0.030	-0.072	-0.568	-0.029
Surgical procedure	0.261	Could not be included in model

¥ grouped in 20 year intervals, in increasing order

ª Reference category is “male”

* GA and GA + RA compared to RA only