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1. Main facts and figures
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around three-quarters of 5 year olds had no obvious tooth decay in 2014/15
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5 year olds from the Black and White ethnic groups were least likely to have obvious tooth decay
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5 year olds from the Chinese, Asian, and Other ethnic groups were most likely to have obvious tooth decay
Things you need to know
The oral health survey is based on a sample of 5 year olds at state-funded mainstream primary schools in England. Sample schools from each local authority were selected and asked to identify pupils to take part.
Keep in mind when making comparisons between ethnic groups that all survey estimates are subject to a degree of uncertainty, as they are based on a sample of the population. In this case, the survey is based on a sample of 5 year olds in school whose parents allowed them to take part, rather than all 5 year olds in England.
What the data measures
This data gives an estimate of the percentage of children aged 5 years who have no obvious tooth decay. The results are broken down by ethnicity.
The results are based on a survey during the 2014/15 school year in which trained dental examiners carried out visual-only examinations to look for signs of tooth decay.
The percentage is calculated as the number of 5 year olds whose examination showed they had no obvious tooth decay, out of the total number of children who were examined.
The data only includes pupils at mainstream state primary schools in England who were 5 years old at the time of the examination.
The ethnic categories used in this data
The oral health survey uses the following broad ethnic groups:
- Asian
- Black
- Chinese
- Mixed
- White
- Other
There’s an additional category for pupils whose ethnic group wasn’t known or recorded.
2. Absence of tooth decay in 5 year olds
| Ethnicity | % |
|---|---|
| All | 75.2 |
| Asian | 63.3 |
| Chinese | 48.7 |
| Black | 78.6 |
| Mixed | 75.2 |
| White | 78.1 |
| Other | 54.5 |
| Unknown | 72.1 |
Download table data for ‘Absence of tooth decay in 5 year olds’ (CSV) Source data for ‘Absence of tooth decay in 5 year olds’ (CSV)
Summary of Absence of tooth decay in 5 year olds Absence of tooth decay in 5 year olds Summary
This data shows that:
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75.2% of 5 year olds had no obvious tooth decay in 2014/15
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5 year olds from the Black and White ethnic groups were most likely to have no obvious tooth decay, at 78.6% and 78.1% respectively – both higher than the average for England of 75.2%
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the ethnic groups in which 5 year olds were least likely to have no obvious tooth decay were those with unknown ethnicity (72.1%), Asian (63.3%), Other (54.5%) and Chinese (48.7%) – all were lower than the average for England
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the percentage of 5 year olds of Mixed ethnicity with obvious tooth decay was the same as the average for England
3. Methodology
The survey sample consisted of children from mainstream, state-funded schools who were aged 5 years at the time of the survey. Examinations were conducted during the 2014/15 academic year using visual-only methods to detect signs of obvious tooth decay. More information about the survey sampling and methodology (PDF opens in a new window or tab).
The parents of children selected for the sample were asked to give consent. Nearly 3 in 10 parents (28.9%) didn’t respond, which was the main reason why children didn’t take part. A small percentage of parents (4.5%) refused consent, while 3.8% of children with consent were not at school at the time of the survey. A very small percentage (0.5%) of children with consent declined to take part on the day.
Weighting
Surveys collect information from a random sample of the target population to make generalisations (reach 'findings’) about everyone within that population.
For those findings to be reliable, the sample of people should ideally contain the same mix of age, gender and regional location as the target population.
Where this isn’t the case (because some people haven’t responded, for example) analysts use statistical tools to ‘weight’ the data. Weighting rebalances the survey responses so they represent the target population more accurately. They can then be used to reach meaningful conclusions.
Population weighting was used to calculate percentages of 5 year olds with no obvious tooth decay at local authority and national level. Deprivation scores were used to weight the sample data to more closely match the distribution of deprivation in 5 bands across the country. More information from the Dental Public Health Intelligence Programme.
Confidence intervals
Confidence intervals for each ethnic group are available in Download the data.
The oral health survey is based on a sample of 5 year olds in school, rather than all 5 year olds in England. This measure makes reliable estimates of the percentage of 5 year olds in England who had no obvious tooth decay, but it’s impossible to be 100% certain of the exact percentage.
Based on the oral health survey results, it’s estimated that 78.1% of White 5 year olds in mainstream schools in England have no tooth decay.
It’s 95% certain, however, that somewhere between 77.8% and 78.3% of all 5 year olds in mainstream schools in England had no obvious tooth decay. In statistical terms, this is a 95% confidence interval. This means that if 100 random samples were taken, then 95 times out of 100 the estimate would fall in this range (that is, between the upper and lower confidence interval). But 5 times out of 100 it would fall outside this range.
The smaller the survey sample, the more uncertain the estimate and the wider the confidence interval. For example, fewer 5 year olds from the Chinese ethnic group responded to the survey than those from other ethnic groups, so we can be less certain about the estimate for the smaller group. This greater uncertainty is expressed by a wider confidence interval, for example of between 44.5% and 52.9% for 5 year old children of Chinese ethnicity with no obvious tooth decay in 2014/15.
Statistically significant findings have been determined where the 95% confidence intervals of an ethnic group do not overlap with the value for all ethnicities combined (75.2%).
Rounding
Percentages are rounded to 1 decimal place.
Related publications
Survey results and statistical commentary
Further technical information
The collection of ethnicity data was made compulsory in the 2015 survey and has resulted in 97.0% of the sample being allocated an ethnicity code.
Find further guidance and descriptions of ethnic groupings at the National Archive page on the ethnicity data standard.
4. Data sources
Source
Publisher
Public Health England
Publication frequency
Every 2 years
Secondary source
Public Health Outcomes Framework: tooth decay is among 5 year olds
Type of data
Survey data
Type of statistic
Official statistics
Publisher
Public Health England
Publication frequency
Every 2 years
Purpose of data source
The aim of the survey is to measure how common and severe tooth decay is among 5 year olds. This can help local authorities prioritise oral health initiatives to help reduce tooth decay.
5. Download the data
This file contains the following: ethnicity, value, denominator, numerator, confidence intervals