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Table 5.3 continued<br />

Author<br />

Year,<br />

reference<br />

Country<br />

Sample, n<br />

Age (yrs)<br />

at start<br />

Teeth<br />

tested,<br />

caries prevalence<br />

at<br />

start, caries<br />

increment/<br />

incidence<br />

during<br />

study<br />

period<br />

Obs<br />

time<br />

(yrs)<br />

Dropout<br />

(%)<br />

Explained<br />

Diagnostic<br />

criteria<br />

Examiner<br />

(n)<br />

Reliability<br />

Burt et al<br />

1994 [40]<br />

USA<br />

All children<br />

in Coldwater,<br />

Michigan<br />

Low caries<br />

prevalence<br />

population<br />

n: 499<br />

Age: 10–15<br />

Permanent<br />

All surfaces,<br />

proximal and<br />

pit & fissures<br />

separately<br />

Mean DMFS:<br />

boys (girls)<br />

Age 10:<br />

0.4 (2.4)<br />

Age 13:<br />

4.1 (5.5)<br />

Age 15:<br />

4.9 (6.0)<br />

3 33<br />

Explained,<br />

analysed<br />

NIDR<br />

1989<br />

No BW<br />

2 experienced<br />

examiners<br />

Yes<br />

Increment<br />

Mean new<br />

DMFS=2.7<br />

(boys) 3.1<br />

(girls), NS<br />

30% had 0<br />

new DMFS,<br />

28% had 1–2<br />

new DMFS,<br />

20% had ≥1<br />

new approximal<br />

DMFS<br />

248<br />

Karies – diagnostik, riskbedömning och icke-invasiv behandling

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