Fig. 4

Trends direction indices in mental health time-series in Danish adults during the COVID-19 pandemic (N=8,261). The continuous lines show the trend direction indeces over the entire study period for the six mental health indicators. A TDI close to 100% indicates that the mental health indicator is increasing on average, a TDI close to 0% indicates that the mental health indicator is decreasing on average, and a TDI of 50% reflects complete uncertainty about the state of average monotonicity