Table 2.

SNQ22 total and error scores by demographics and Clinical Dementia Rating

Characteristics		n	Total SNQ22: Mean (SD)	p-value*	Over-adherence errors: Mean (SD)	p-value*	Break–norms errors: Mean (SD)	p-value*
Age at Wave 9.	65–74	45	20.38 (1.64)	<0.0001 **	1.07 (1.32)	<0.0001**	0.56 (0.78)	0.4293
	75–84	342	20.90 (1.70)		1.22 (1.33)		0.59 (1.02)
	85+	358	19.56 (1.98)		1.79 (1.68)		0.65 (0.98)
Gender	Male	259	19.41 (1.92)	<0.0001	1.78 (1.53)	0.0001	0.81 (1.13)	0.0001
	Female	486	20.17 (1.78)		1.32 (1.51)		0.51 (0.89)
Race	White	709	19.94 (1.84)	0.0443	1.46 (1.51)	0.0943	0.61 (0.98)	0.3609
	Other	36	19.21 (2.13)		2.00 (1.91)		0.79 (1.17)
Education	< HS	74	19.60 (2.19)	0.4950	1.74 (1.79)	0.5467	0.66 (0.99)	0.9145
	= HS	307	19.91 (1.80)		1.50 (1.54)		0.59 (0.94)
	> HS	364	19.96 (1.86)		1.42 (1.47)		0.63 (1.03)
CDR	0	544	20.13 (1.66)	<0.0001**	1.29 (1.37)	<0.0001**	0.58 (0.94)	0.5589
	0.5	171	19.39 (2.15)		1.90 (1.72)		0.71 (1.12)
	≥ 1	30	18.33 (2.44)		2.96 (2.23)		0.71 (1.04)

^*p-values based on non-parametric tests; Wilcoxon rank-sum or Kruskal-Wallis as appropriate.

^**post-hoc pairwise comparisons using Dunn’s test with Bonferroni-adjusted p-value of 0.0167 were significant (i) for Total SNQ22: age 75–84 vs. age 85+; CDR=0 vs. CDR =0.5, and CDR =0 vs. CDR >=1;

(ii) for Over-adherence subscale: age 65–74 vs. age 85+ and age 75–84 vs. 85+; CDR=0 vs. CDR=0.5 and CDR=0 vs. CDR >=1.