Table 4.

Comparison of component loadings using domain scores following promax rotation.

	Nursing home cohorts
	2004, n = 830			2011, n = 1359
Item	PC1	PC2	PC3	PC1	PC2	PC3
Classical principal component analysis
Delusions	0.14	0.44	−0.23	−0.50	0.09	0.11
Hallucinations	0.07	0.43	−0.12	−0.53	0.14	0.03
Agitation	0.39	0.18	0.00	−0.07	−0.07	0.52
Depression	−0.14	0.52	0.34	−0.23	−0.49	0.05
Anxiety	−0.01	0.50	0.09	−0.43	−0.32	−0.18
Euphoria	0.36	−0.12	−0.21	0.03	0.08	0.30
Apathy	−0.02	0.11	0.64	0.22	−0.59	0.11
Disinhibition	0.49	−0.02	0.07	−0.02	−0.03	0.55
Irritability	0.42	0.16	0.09	−0.08	−0.08	0.51
Motor	0.39	−0.10	0.23	−0.24	−0.02	0.11
Sleep	0.27	−0.05	−0.03	−0.33	0.07	0.07
Appetite	0.18	−0.12	0.55	0.15	−0.52	0.09
Bivariate zero-inflated poisson principal component analysis
Delusions	0.13	0.66	0.04	0.09	0.69	0.03
Hallucinations	−0.04	0.72	−0.05	−0.05	0.72	0.05
Agitation	0.63	0.07	−0.01	0.61	0.04	0.01
Depression	−0.01	−0.04	0.71	0.05	0.01	0.70
Anxiety	0.02	0.02	0.69	−0.02	−0.03	0.70
Euphoria	0.02	−0.05	0.00	0.01	0.00	0.00
Apathy	0.00	−0.03	0.13	0.00	0.00	0.04
Disinhibition	0.37	−0.19	−0.03	0.47	−0.10	0.08
Irritability	0.68	0.02	0.02	0.63	0.04	0.06
Motor	0.01	−0.01	0.00	0.01	0.00	0.00
Sleep	0.00	0.00	0.00	0.02	0.00	0.00
Appetite	0.00	0.00	0.00	0.00	0.00	0.00

Note. Component loadings >0.1 in absolute value in bold. Domain scores = frequencies

^*intensities; PC = principal component.