Figure 4.

Changes in Relative Search Volume (RSV) leading up to World Mental Health Day, World Mental Health Day and 7 days following it. Each data point indicates the Relative Search Volume (RSV) measured on the specified day. RSV is the query share of a particular term for a given location and time period, normalised by the highest query share of that search term. Black vertical line marks the day of the Global Public Health Day. Colour scheme: Blue = 1^st slope, green = 2^nd slope, red = 3^rd slope, mint green = 4^th slope. Number of slopes present depends on the number of joinpoints identified. Joinpoints mark a statistically significant change in the linear slope of the trend in the studied time period.