Section 3. Methodology Table 1: Sample sizes and response rates across STCs and YOIs during 2018–19 Date of survey YOIs Parc Cookham Wood Feltham A Werrington Wetherby Keppel unit 15 October 2018 10 December 2018 14 January 2019 18 February 2019 11 March 2019 11 March 2019 YOI total Date of survey STCs Rainsbrook Medway Oakhill 2 October 2018 22 November 2018 2 April 2019 STC total YOI AND STC TOTAL Population on survey date Number of questionnaires distributed Number of returned questionnaires Response rate10 36 36 31 86% 162 156 126 78% 147 141 125 85% 114 112 99 87% 210 208 191 91% 40 39 31 78% 709 692 603 85% Population on survey date Number of questionnaires distributed Number of returned questionnaires Response rate11 65 63 46 71% 35 34 31 89% 45 43 37 82% 145 140 114 79% 854 832 717 84% Non-responses 3.4 Missing data, where respondents have not answered a question, have been excluded from the analysis. This means that the percentages calculated are from a total sum where there may have been different response rates to each question within the survey. 3.5 Figures quoted in this report have been rounded to the nearest whole number. In some cases, due to the way we round the data, a result of 0% can, in fact, have been reported and/or experienced by a very small number of children. For example, across the entire YOI sample of 603 individuals, the responses of two children on a given issue would appear as 0% in our report. 10 11 20 Calculated as a proportion of children resident in the establishment at the time of the survey. Calculated as a proportion of children resident in the centre at the time of the survey. Children in Custody 2018–19