Table 4.

Regression tested by the mediation model in worst pain (n = 89).

Regression equation	PCS		Worst pain		Worst pain
	t	95% CI	t	95% CI	t	95% CI
(Constant)	1.834	−0.755∼18.706	−1.263	−3.164∼0.705	−0.753	−2.702∼1.217
FOP-9	4.491∗∗	0.495∼1.282	1.590	−0.171∼0.153	2.922	0.372∼0.196
Analgesic drugs	1.033	−1.655∼5.238	4.694∗∗	0.920∼2.273	4.853∗∗	1.000∼2.388
PCS			2.581∗	0.013∼0.096
R-squared	0.208		0.345		0.294
F	11.299∗∗		14.945∗∗		17.908∗∗

PCS, Pain Catastrophizing Scale; CI, confidence interval; FOP-9, Fear of Pain-9 Items; ^∗p < 0.05; ^∗∗p < 0.01. FOP-9 as an independent variable, PCS as a mediating variable, and analgesic drugs as a covariate value.