Emotional wellbeing is measured here using the five-question World Health Organization Wellbeing Index (WHO-5), which is a widely-used tool for assessing subjective wellbeing . Respondents to the Canterbury Wellbeing Survey are asked to rate the extent to which each of five emotional wellbeing components (cheerful, calm and relaxed, active and vigorous, fresh and rested, and interest in daily life) has been present or absent in their lives over the previous two-week period.
This indicator presents the WHO-5 Wellbeing Index mean raw score for greater Christchurch respondents. The index is scored out of a maximum 25 points, with higher scores indicating better wellbeing.
The figure shows that the overall emotional wellbeing of greater Christchurch residents (as measured by the WHO-5 Wellbeing Index) has improved over the last five years. After minor fluctuations between 2013 and 2015, the mean WHO-5 score has increased to reach the highest level yet recorded (15.4) in May 2018. This overall upward trend is statistically significant, as is the single increase between June 2017 and May 2018. While there is no pre-earthquake or New Zealand WHO-5 data available for comparison, a representative, population-based survey of adults in the UK  found a WHO-5 mean raw score of 14.7.
The figure shows similar WHO-5 Wellbeing Index scores for European respondents (15.4), Māori respondents (15.1), and Pacific/Asian/Indian respondents (15), in May 2018. While the WHO-5 Wellbeing Index scores have generally been lower for Māori respondents compared with European and Pacific/Asian/Indian respondents (2013 to 2016), the majority of these differences have not been statistically significant.
The figure shows a pattern of generally similar WHO-5 Wellbeing Index mean scores for the age groups 18 to 24 years, 25 to 34 years, 35 to 49 years, and 50 to 64 years, over the period 2013 to 2018. For the 65 years and over age group, a different pattern is seen. For 2017 and 2018, respondents 65 years and over had statistically significantly higher mean WHO-5 scores compared with all of the other age groups (and statistically significantly higher scores than some other age groups at earlier time-points).
The figure shows a positive relationship between income and emotional wellbeing (WHO-5 Wellbeing Index average scores) for greater Christchurch, with higher income groups having higher emotional wellbeing. The differences shown between the highest income group ($100,000+ annual household income) and the lowest income group (<$30,000) have been statistically significant at all time-points (for 2018, average WHO-5 scores 15.8 and 14.5 respectively). The differences between the middle income groups are not statistically significant.
The figure shows that respondents with a disability or long-term health condition, had lower WHO-5 Wellbeing Index mean scores compared with respondents without a disability or long-term health condition, across the time-series from 2013 to 2018 (for 2018, mean WHO-5 score 12.8 and 16.0 respectively). While mean scores for both groups appear to show an overall upward trend, the difference between the two groups is both substantial and statistically significant throughout the time-series.
Source: Canterbury District Health Board.
Survey/data set: Canterbury Wellbeing Survey to 2018. Access publicly available data from the Community and Public Health (Canterbury DHB) website www.cph.co.nz/your-health/wellbeing-survey/
Source data frequency: Annually.