Table 4.

Hazard ratios (95% CI) for associations between selected questionnaire answer pattern indices and subsequent dementia risk in the Health and Retirement Study (N=12,554).

Tertile for each variable	Proportion of skipped items	Multivariate outlier rate	Normed Guttman errors	Interitem SD	Person-total correlation
Low	Reference	Reference	Reference	Reference	Reference
Middle	1.34 (1.15-1.56)	1.38 (1.12-1.71)	1.43 (1.18-1.76)	1.28 (1.05-1.57)	1.40 (1.14-1.71)
High	1.52 (1.24-1.86)	2.25 (1.84-2.75)	2.09 (1.73-2.53)	1.93 (1.61-2.34)	2.03 (1.68-2.46)