Participation is mandatory for NHS trusts but the number of survey respondents varies between them. Caution should be used when comparing trusts where the results are based on a small number of respondents.
The NHS Staff Survey was completed by NHS staff in 235 NHS trusts. Data from 2 of the trusts was suppressed to improve reliability because they had fewer than 11 respondents from the Other ethnic group. This means the percentages shown here are based on 233 trusts (99%), with a total of 452,446 respondents.
Some trusts selected a sample of staff to take part in the survey, while others invited all their staff to respond. Where a trust selected a sample, the sample may not have been representative of all staff in that trust. Staff who completed the survey might have had different experiences at work than staff who didn’t do so.
The data only includes staff who reported their ethnic group. Staff from some ethnic groups might be less likely to report their ethnicity or reply to certain survey questions. Therefore, the results may not be representative of all staff working for NHS trusts. No adjustments have been made to the results to compensate for any possible biases.
There will be a margin of error around all the estimates presented - some of which may be large, but we do not know the sizes of these margins of error.
We have therefore not commented on differences observed in the data of a few percentage points, as they may not indicate real differences. It is possible that some of the larger differences observed in the data, including those which we have commented on, are also within the margin of error, but we’re not able to assess this.