A comparison of the four healthy days measures (HRQOL-4) with a single measure of self-rated general health in a population-based health survey in New York City

Table 2 Weighted conditional margins estimating the mean number of days of poor physical health, days poor mental health, days of activity limitations, overall unhealthy days (UHD index), and probability of poor health as measured by a simple summary score (SSS index) at each level of self-rated general health, 2017 NYC Social Determinants of Health Survey

	Self-rated general health					p value
	Excellent	Very Good	Good	Fair	Poor	p value
Days of poor physical health, past 30 days (mean days, 95% CI; n = 2213)	1.2 (0.7, 1.8)	1.9 (1.4, 2.3)	3.8 (3.1, 4.5)	10.0 (8.2, 11.8)	22.1 (19.8, 24.5)	< 0.001
Days of poor mental health, past 30 days (mean days, 95% CI; n = 2219)	1.7 (1.0, 2.5)	2.9 (2.2, 3.6)	5.0 (4.2, 5.9)	7.3 (5.9, 8.8)	16.4 (13.4, 19.3)	< 0.001
Days of activity limitations, past 30 days (mean days, 95% CI; n = 2225)	0.8 (0.4, 1.3)	1.0 (0.6, 1.3)	3.2 (2.5, 3.8)	7.8 (6.1, 8.7)	17.3 (14.3, 20.3)	< 0.001
UHD index (mean days, 95% CI; n = 2195)	2.7 (1.9, 3.6)	4.4 (3.7, 5.2)	8.0 (6.9, 9.1)	15.5 (13.5, 17.5)	26.4 (24.7, 28.2)	< 0.001
SSS index (%, 95 CI; n = 2219)^a	0.2 (0.0, 1.2)	0.2 (0.0, 1.2)	2.0 (1.0, 4.1)	28.7 (21.7, 36.9)	72.7 (61.0, 82.0)	< 0.001

Abbreviations: UHD Unhealthy days, SSS Simple summary score
^a Predicted probability of someone categorized as having “poor health” by the SSS index falling into each of the five self-rated health categories

ISSN: 1477-7525