Table 1.

Exploratory factor analysis findings for the SIP-A and SIP-D items

Item	SIP-A Loading	SIP-D Loading
I have been unhappy because of …	.95	.94
I have not eaten properly because of …	.93	.90
Failed to do what was expected because of …	.96	.94
Felt guilty because of …	.95	.95
Taken foolish risks because of …	.95	.96
Done impulsive things when …	.94	.91
Physical health harmed by …	.92	.84
Had money problems because of …	.96	.94
Physical appearance harmed by …	.93	.88
Family hurt by …	.97	.96
Friendship damaged by ….	.94	.90
… gotten in the way of my growth	.98	.94
… damaged my social life	.96	.92
Spent too much time because of …	.96	.66
Have had an accident while …	.70	.43
Eigenvalue	13.29	12.37
% of variance	88.6	82.4
α	.98	.97

Notes: SIP-A = Short Index of Problems-Alcohol; SIP-D = Short Index of Problems-Drugs.