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. 2022 Jun 12;117:152331. doi: 10.1016/j.comppsych.2022.152331

Table 2.

Zero-inflated negative binomial regression results explaining gambling problems and gaming problems, and excess zeroes (inflation).

	Gambling problems			Gaming problems
	IRR	Robust SE	95% CI	IRR	Robust SE	95% CI
COVID-19 anxiety	1.05*	0.02	1.01–1.09	1.03**	0.012	1.01–1.05
Mental health (MHI-5)	1.04	0.30	0.98–1.10	1.10***	0.020	1.04–1.11
Social motive	1.70**	0.27	1.21–2.30	2.04***	0.230	1.64–2.54
Age	0.99	0.01	0.99–1.01	0.99	0.004	0.99–1.00
Female gender	0.83	0.13	0.61–1.14	0.84	0.096	0.67–1.05

	OR	Robust SE	95% CI	OR	Robust SE	95% CI

Inflation
COVID-19 anxiety	−0.04	0.030	−0.10–0.02	−0.03	0.02	−0.07–0.01
Mental health (MHI-5)	−0.09	0.051	−0.19–0.01	−0.10	0.04	−0.18–-0.01
Social motive	−1.34**	0.411	−2.15–-0.54	−1.70***	0.30	−2.22–-1.10
Age	0.01	0.010	−0.01–0.04	0.04***	0.01	0.03–0.06
Female gender	0.53*	0.234	0.07–0.99	0.26	0.22	−0.17–0.68
(/ln)alpha	0.90***			−0.41*

p < 0.05; p < 0.01; **p < 0.001
Wald χ²: (5)	53.64			109.45
Max. likelihood R²	0.11			0.12
Cragg & Uhler's R²	0.11			0.28
McFadden's Adj. R²	0.04			0.11