Conventions used in figures and tables
The following conventions are used in the figures and tables for this report, including the annexes.
Figures and tables
Each figure or table has a title (1), the data source (survey and year) (2), a base definition and the unweighted base figures (3), and the SPSS data file variable name (4). For example:
- Figure 2.4: % of adults aged 16 or over reporting drug use ever by drug used
- SCJS 2010/11
- Base: Adults aged 16 or over (10,999)
- Variable name: QEVE
All SCJS percentages and rates presented in the figures and tables are based on weighted data (see Annex 2 for further details). However, figures and tables show the unweighted base above the figure or below the table which represents the number of respondents interviewed in the specified group.
Row or column percentages may not add to 100 per cent due to rounding.
Most figures / tables present cell percentages where the figures refer to the percentage of respondents that have the attribute being discussed. The complementary percentage to add to 100 per cent may not be shown. Respondents could refuse to answer any question they did not wish to answer. The majority of questions also had a 'don't know' option. Percentages are often not shown for these response categories.
A percentage may be quoted in the report text for a single category that is identifiable in the figures / tables only by summing two or more component percentages. In order to avoid rounding errors, the percentage has been recalculated for the single combined category and therefore may differ by one percentage point from the sum of the percentages derived from the figures / tables.
Percentages in the figures in the main body of the report are displayed to one decimal place.
Email: Stuart King