Table 1.

Changes in caries prevalences and indexes between 2012 and 2019 for 12 years old children, per province.

Sample	South		North		Loyauty Islands		New Caledonia
	N (%)		N (%)		N (%)		N
2012	842 (70.1%)		249 (20.7%)		110 (9.2%)		1,201
2019	459 (66.23%)		137 (19.77%)		97 (14%)		693
Prevalence	N (%)	OR [IC]	N (%)	OR [IC]	N (%)	OR [IC]	N (%)	OR [IC]
Prevalence for untreated dental caries (D3T≠0)
2012	371 (44.1%)		128 (51.6%)		64 (57.7%)		563 (46.9%)
2019	122 (26.6%)	0.39 [0.19–0.79]*	42 (30.6%)	0.53 [0.28–1]*	47 (48.5%)	0.73 [0.38–1.38]	211 (30.5%)	0.46 [0.3–0.71]*
Prevalence for teeth affected by dental caries (DM3FT ≠ 0)
2012	479 (56.9%)		152 (61.3%)		67 (60.4%)		698 (58.1%)
2019	178 (38.8%)	0.42 [0.22–0.79]*	56 (40.9%)	0.43 [0.24–0.76]*	55 (56.7%)	0.94 [0.46–1.92]	289 (41.7%)	0.47 [0.32–0.68]*
Caries indexes	Mean ±SD		Mean ±SD		Mean ±SD		Mean ±SD
D 3 T index
2012	1.39 ± 40		1.82 ± 2.58		1.50 ± 1.80		1.49 ± 2.39
2019	0.68 ± 1.52*		0.68 ± 1.35*		1.56 ± 2.01		0.79 ± 1.59*
D 3 MFT
2012	2.06 ± 2.86		2.34 ± 2.93		1.65 ± 2.05		2.09 ± 2.82
2019	1.15 ± 2.02*		1.07 ± 1.82*		2.04 ± 2.52		1.26 ± 2.08*
SIC
2012	5.45 ± 2.93		5.52 ± 2.62		4.28 ± 1.90		5.37 ± 2.80
2019	3.91 ± 2.20*		3.6 ± 2.00*		4.49 ± 2.07$		3.97 ± 2.15*

OR odd ratio with IC = 95% confidence interval.

D₃MFT, number of permanent teeth affected by dental caries (decayed, missing or filled).

D₃, decayed teeth diagnosed at the dentinal/cavity stage.

SIC, average DMFT for the most affected third of the population.

^*p < 0.05 multilevel mixed effects generalized linear models (random effects considering investigator and school effects).

^$NaN, not a number. Significant Caries Index (SIC).