Table 1.

Comparison of persons with and without dental data included in the Rochester Epidemiology Project* (data from 2012 to 2014)

	Population	Have dental data		Have no dental data		p Value for comparison†
Characteristic	Total N	N	Per cent	N	Per cent
All persons	158 786	31 750	20.0	127 036	80.0	–
Sex
Men	75 130	14 032	18.7	61 098	81.3	<0.0001
Women	83 656	17 718	21.2	65 938	78.8	–
Age, years
0–18	42 786	9752	22.8	33 034	77.2	<0.0001
19–39	47 270	7680	16.2	39 590	83.8	–
40–64	48 281	10 129	21.0	38 152	79.0	–
65+	20 449	4189	20.5	16 260	79.5	–
Race
White	127 781	27 217	21.3	100 564	78.7	<0.0001
Black	9517	1021	10.7	8496	89.3	–
Asian	8686	1703	19.6	6983	80.4	–
Other‡	12 802	1809	14.1	10 993	85.9	–
Ethnicity
Hispanic	10 579	1794	17.0	8785	83.0	<0.0001
Non-Hispanic	148 207	29 956	20.2	118 251	79.8	–

*The population was defined at the 2013 Rochester Epidemiology Project Census.

†χ² test of homogeneity to determine whether the frequency counts are distributed similarly across persons who do or do not have dental data.

‡The other race category includes persons of a race other than white, black or Asian and persons with unknown race.