Table 3.

Final model for the Kansas City Cardiomyopathy Questionnaire overall summary score

Variable	B estimate for transformed outcome	95 % CI	B estimate on original scale	P-value
Cohort				0.002
Cognitively impaired + /sleepy +	–1066.8	–1656.7 to –476.8	–32.7	<0.001
Cognitively impaired–/sleepy +	–626.0	–1216.6 to –35.5	–25.0	0.038
Cognitively impaired + /sleepy–	–254.8	–892.8 to 383.2	–16.0	0.432
Cognitively impaired–/sleepy–	(ref)
NYHA functional class				<0.001
Class I–II	(ref)
Class III	–1306.6	–1602.3 to –1011.0	–36.1	<0.001
Class IV	–2411.2	–2858.0 to –1964.4	–49.1	<0.001

Model adjusted for age, race, income, gender, data collection occasion, depressive symptoms, perceived health, visit occasion, and data collection site.

Square-transformed Kansas City Cardiomyopathy Questionnaire total score was modelled.

CI, confidence interval; NYHA, New York Heart Association.