Table 3.

Estimated change in substance use and other reinforcing behaviours from before to during the COVID-19 crisis based on latent change score model and percentage of change (n = 2,344)

Change in	Estimate	Bias-corrected percentile bootstrap confidence intervals
		2.5%	97.5%	% change
Weekly drinking volume (n standard drinks)	−1.15	−1.55	−0.80	−16.8%
Weekly frequency of heavy episodic drinking	−0.05	−0.08	−0.02	−17.7%
Weekly number of cigarettesa	−0.81	−1.78	0.18	4.9%
Weekly frequency of illegal cannabis use	0.02	−0.01	0.05	6.4%
Weekly hours spent gaming	3.08	2.76	3.43	75.3%
Weekly hours spent watching TV series	3.55	3.23	3.88	75.0%
Weekly hours spent watching internet pornography	0.23	−0.05	0.51	4.7%

Note. Coefficients in bold are significant according to bias-corrected 2.5% and 97.5% percentile bootstrap confidence intervals. ^aThis change is significant in the sensitivity analysis (see Table S3).