Relationship between tooth loss and mortality in 80-year-old Japanese community-dwelling subjects

BMC Public Health

Table 2 Dental characteristics of 80-year-old subjects based on survival during 5.5-year follow-up period

Characteristic	Alive	Died	P value
	(n = 540)	(n = 157)
Number of teeth^a	8.4 (9.0)	6.7 (8.2)	0.031
Number of missing teeth^a	23.5 (9.0)	25.3 (8.2)	0.026
Number of edentulous subjects^a	178 (75.4%)	58 (24.6%)	0.196
Number of dentate subjects	353 (78.6%)	96 (21.4%)
Number of teeth & denture status^b
No denture	89 (83.9%)	17 (16.1%)	0.108
PDs	114 (80.9%)	27 (19.1%)
Either PD or FD	142 (74.3%)	49 (25.7%)
FDs	164 (73.9%)	58 (26.1%)
Self-care^c
Yes	400 (78.7%)	108 (21.3%)	0.091
No	103 (72.1%)	40 (27.9%)
Toothbrushing^d
≥ 2 times/day	240 (83.6%)	47 (16.4%)	0.004
< 2 times/day	213 (73.7%)	76 (26.3%)
Regular checkups by dentist^e
Yes	360 (79.6%)	92 (20.4%)	0.027
No	151 (71.9%)	59 (28.1%)

Abbreviations: FD, full denture; PD, partial denture (including fixed prostheses).
Data indicate the number of subjects (%) or mean (SD).
Data available for ^a685, ^b660, ^c651, ^d576, and ^e662 people, respectively.
Differences between groups were tested using a Pearson chi-square test for categorical variables and an ANOVA for continuous variables.

ISSN: 1471-2458