Table 1.

The 2- and 3-factor models of OCPD

DIPD items	2-factor model		3-factor model
	Perfectionism	Rigidity	Perfectionism	Rigidity	Miserliness
Rigid and stubborn		X		X
Miserly		X			X
Packrat	X				X
Perfectionism	X		X
Details, rules, lists, order	X		X
Reluctance to delegate		X		X
Inflexible about morality		X		X
Workaholic	X		X

All items are included in the single-factor model of DSM-IV OCPD. The 2-factor model is derived from Baer’s¹² DSM-III–based factor analysis of OCPD items. The 3-factor model is from Grilo’s⁶ DSM-IV factor analysis of OCPD items.