Coefficients from separate regression models by topic with 95% confidence intervals. Dependent variable is ln(calls+1), and independent variables are measured in logs as well39,40. The sample includes all calls to Telefonseelsorge (Germany) and S.O.S. Amitié (France) for which at least one conversation topic was recorded, aggregated to daily totals from January 1, 2019 to March 31, 2021; see Methods, equation (7).