TABLE 2.

Internal consistency (Cronbach’s alpha) of the SIP-DU compared to other SIP instruments

SIP scales	SIP-DU primary care (n = 106)	SIP-SUD (n = 57)	SIP community residents (n = 153)	SIP emergency department (n = 404)	DrInC (n = 1,389)
Total	.95	.93	.79	.95	.89
Physical	.72	.73	.64	.79	.67
Social	.90	.74	.62	.85	.76
Interpersonal	.85	.88	.61	.86	.76
Intrapersonal	.87	.76	.58	.89	.77
Impulse	.82	.62	.56	.73	.61

SIP = Short Inventory of Problems^10,11; SIP-DU = Short Inventory of Problems—Drug Use; SIP-SUD = Short Inventory of Problems—Substance Use Disorder⁴; DrInC = Drinker Inventory of Consequences.⁵