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Table 7 Comparison of dental caries level in different geographic population

From: Longitudinal measurement invariance and explanatory IRT models for adolescents’ oral health-related quality of life

Age range

Population

Dental caries level

Study

Non‑Significant relationship to OHRQoL

 12, 15,18

Hong Kong

Mean DMFT at age 12,15 and 18 = 0.6, 1.1, 1.5 respectively

[29]

 12‑13

Dunedin, New Zealand

Mean DMFS = 1.6

[26]

DMFS> 0 = 44.2%

Significant relationship to OHRQoL

 14‑17

Santa Catarina State, Brazil

Mean DMFT = 5.4

[30]

DMFT> 0 = 88.2%

 11‑13

Iran

Mean DMFT = 1.8

[31]

 12 & 15

Modinagar, India

DMFT> 0 = 63%

[32]

 12 & 15

Thailand

Mean DMFT =1.3‑2.1 (12 years old), Mean DMFT = 1.9‑2.9 (15 years old) in different regions

[33]

 15‑19

Brazil general population

> 0 untreated caries = 46.1%

[34]

 10‑14

Thailand

Mean DMFT = 1.97 (Association found only in 6 month follow‑up)

[21]