Table 3

Results of meta-regression without subgroups

Study arm	Intervention arm			Control arm
Variable	Regression coefficient	P value		Regression coefficient	P value
Sample size	0.023	0.445		−0.025	0.247
Type of journaling	−0.043	0.176		−0.036	0.124
Study duration	−0.052	0.183		−0.043	0.147
Journal analysis	−0.064	0.021*		−0.026	0.254
Sex	0.052	0.063		0.030	0.158
Age	0.019	0.503		−0.034	0.111
Region-Europe	−0.097	0.217	0.502†	−0.023	0.714	0.971†
Region-North America	−0.122	0.150		−0.022	0.750
Region-Australia	−0.060	0.596		−0.042	0.635
Depression‡	0.060	0.122	0.266	0.006	0.838	0.763
PTSD‡	0.030	0.459	0.266	0.022	0.51	0.763

*Sample size <30 or>30.
†When regions analysed in aggregate.
‡Depression and PTSD regression analyses were calculated using anxiety as the reference category.
PTSD, post-traumatic stress disorder.