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Table 4 Crude and standardized annual numbers (%) of examined year 8 children in New Zealand who had no obvious decay experience (caries-free) together with mean DMFT

From: Water fluoridation and ethnic inequities in dental caries profiles of New Zealand children aged 5 and 12–13 years: analysis of national cross-sectional registry databases for the decade 2004–2013

 

Crude

Standardizeda

Year

No. Exam

No. caries-free

(%)

Mean DMFT

Popn

No. caries-free

(%)

Mean DMFT

2004

49,456

22,573

(45.6)

1.57

64,025

28,801

(45.0)

1.60

2005

48,711

21,569

(44.3)

1.67

63,050

27,637

(43.8)

1.70

2006

48,738

22,276

(45.7)

1.57

62,385

28,216

(45.2)

1.60

2007

46,592

21,737

(46.7)

1.53

61,715

28,692

(46.5)

1.54

2008

47,037

23,997

(51.0)

1.42

61,355

31,105

(50.7)

1.44

2009

46,220

24,079

(52.1)

1.36

60,610

31,255

(51.6)

1.39

2010

46,740

24,890

(53.3)

1.23

60,460

31,771

(52.5)

1.26

2011

44,659

23,993

(53.7)

1.24

60,210

31,972

(53.1)

1.27

2012

47,121

26,370

(56.0)

1.16

60,650

33,445

(55.1)

1.20

2013

46,059

25,060

(54.4)

1.12

61,025

32,923

(53.9)

1.15

  1. aUp-scaled to national figures based on (i) Statistic New Zealand’s annual population estimates of children by ethnicity, (ii) fluoridation exposure estimates, modelled using a quadratic regression model from the observed annual data over the study period by ethnicity, and (iii) assuming unobserved children’s measurements can be estimated by the observed values for each ethnicity/fluoridation/year combination
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BMC Oral Health

ISSN: 1472-6831

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