Erratum to: 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.

Erratum

After the publication of this work [1], we became aware that the total number of being “unmarried” in Table 1 was incorrect. In the Norwegian study, marital status was originally categorized as (1) married, (2) unmarried, (3) divorced and (4) widowed. For the purpose of analysis, the variable was dichotomized as (1) married (including the original category 1) and (0) unmarried (including the original categories (2,3), whereas the original category (4) was set to missing instead of correctly being included into the unmarried category of the dichotomy variable. This error has been corrected in a revised Table 1 included in this erratum. The new categorization of the variable marital status did not influence the results and conclusion of the article. We regret any inconvenience that this inaccuracy might have caused.

Table 1

Socio-demographics and oral health status at baseline according to follow-up status in Norway and Sweden

	Norway			Sweden
	Lost to			Lost to
	Follow-up	Followed up	Baseline	Follow-up	Followed up	Baseline
	n = 1264	n = 2947	n = 4211	n = 1216	n = 4862	n = 6078
	% (n)	% (n)	% (n)	% (n)	% (n)	% (n)
Gender
Males	48.3(561)	51.2(1486)	50.4(2047)	51.4(625)	48.8(2373)	49.3(2998)
Females	51.7(600)	48.8(1415)	49.6(2015)	48.6(591)	51.2(2489)	50.7(3080)
Marital status
Unmarried	22.9(262)	19.6(565)	20.5(827)	32.2(378)	20.8(995)	23.1(1373)
Married	77.1(883)	80.4(2314)*	79.5(3197)	67.8(797)	79.2(3781)**	76.9(4578)
Country of birth
Native	97.2(1120)	98.1(2822)	97.8(3942)	90.1(1057)	94.6(4520)**	93.7(5577)
Foreign	2.8(32)	1.9(56)	2.2(88)	9.9(116)	5.4(259)	6.3(375)
OIDP
OIDP = 0	66.7(724)	71.0(1975)	69.8(2699)	67.2(751)	72.7(3375)	71.6(4126)
OIDP > 0	33.3(361)	29.0(806)*	30.2(1167)	32.8(367)	27.3(1269)**	28.4(1636)
Satisfaction with oral health
Satisfied	72.2(824)	78.2(2241)**	76.5(3065)	69.2(801)	78.6(3748)**	76.8(4549)
Dissatisfied	27.8(318)	21.8(625)	23.5(943)	30.8(356)	21.4(1018)	23.2(1374)
Satisfaction with tooth appearance
Satisfied	75.4(859)	80.3(2306)**	78.9(3165)	72.2(837)	78.9(3768)**	77.6(4605)
Dissatisfied	24.6(280)	19.7(567)	21.1(847)	27.8(323)	21.1(1008)	22.4(1331)
Tooth loss
All/Almost all teeth	65.4(738)	78.2(2224)	74.6(2962)	62.8(723)	74.1(3515)	71.9(4238)
Lost teeth	34.6(390)	21.8(619)**	25.4(1009)	37.2(428)	25.9(1230)**	28.1(1658)

Chi Square test: *p < 0.05, **p < 0.001.