Change in Oral Impacts on Daily Performances (OIDP) with increasing age: testing the evaluative properties of the OIDP frequency inventory using prospective data from Norway and Sweden

Table 3 Longitudinal validity: mean change OIDP scores (sd) and [effect sizes] by change scores of reference variables (Norwegian cohort n = 2947) (Swedish cohort n = 4862)

	Satisfaction with oral health
	Worsened^a	Stable^b	Improved^c	Total
Norway
OIDP change score	−1.60 (5.2) [0.4]	0.02 (2.3)[0.0]	1.28 (4.3)[0.2]**	0.04 (3.3) [0.1]
Sweden
OIDP change score	−0.56 (4.1) [0.2]	0.28 (2.7) [0.1]	2.14 (5.4) [0.4]**	0.49 (3.6) [0.1]
	Satisfaction with tooth appearance
	Worsened ^a	Stable ^b	Improved ^c	Total
Norway
OIDP change score	−1.93 (5.4) [0.5]	0.03 (2.5)[0.0]	1.41 (3.9)[0.3]**	-
Sweden
OIDP change score	−0.59 (4.0)[0.2]	0.34 (2.9)[0.1]	1.88 (5.3) [0.3]**	-
	Tooth loss
	Lost teeth ^a	Stable all teeth ^b	Stable tooth loss ^c	Total
Norway
OIDP change score	−0.72 (4.6)[0.4]	0.01 (2.0)[0.0]	0.21 (6.1)[0.3]*	-
Sweden				-
OIDP change score	−0.14 (3.9) [0.4]	0.25 (2.1)[0.1]	1.13 (6.4) [0.2]**	-

Data are given as mean (sd) [effect size].
One-way ANOVA: *p < 0.05, **p < 0.001.
Bonferroni post hoc analyses indicated the following (p < 0.05):
● Statistically significant differences in mean OIDP change by change score of satisfaction with oral health and change score of satisfaction with tooth appearance in Norway and Sweden: group a vs. group b, group a vs. group c and group b vs. group c.
● Statistically significant differences in mean OIDP change by change score of tooth loss in Norway: group a vs. group b, group a vs. group c.
● Statistically significant differences in mean OIDP change by change score of tooth loss in Sweden: group a vs. group c and group b vs. group c.

ISSN: 1472-6831