Table 7.

Hierarchical regression analyses of the contribution of pain catastrophizing to pain intensity and interference

Variable	Adj. R2	Adj. ΔR2	ΔF	β
Pain intensity (on average)
Block 1	0.08	0.08	35.88***
Age at menarche				−0.04
Heavy flow				0.19***
Block 2	0.24	0.15	158.32***
Pain catastrophizing				0.40***
Pain intensity (most severe)
Block 1	0.06	0.06	25.50***
Age at menarche				−0.07*
Heavy flow				0.13***
Block 2	0.21	0.15	154.17***
Pain catastrophizing				0.41***
Pain interference
Block 1	0.33	0.33	129.53***
Age at menarche				0.00
Heavy flow				0.08**
Pain intensity				0.34***
Block 2	0.49	0.16	240.46***
Pain catastrophizing				0.45***

^* P < 0.05.

^** P < 0.01.

^*** P < 0.001.