Table 4.

Linear regression model.

	Estimate	p-value
Knowledge COVID-19
Age	0.183	<.01*
Gender	−0.057	.42
Education of mother (university)	0.199	<.01*
At least 2 children in the household	−0.015	.76
Cramped living conditions	−0.057	.56
Mental stress in the family	0.071	.04*
Knowledge hygiene measures
Age	0.116	<.01*
Gender	−0.028	.64
Education of mother (university)	0.066	<.01*
At least 2 children in the household	0.015	.73
Cramped living conditions	−0.077	.37
Mental stress in the family	0.102	.03*

^*Statistically significant (p < 0.05).

A stepwise selection of risk factors was performed;—indicates not an important risk factor with additional value for prediction in this model.

R-square knowledge COVID-19: 0.46; R-square knowledge hygiene measures: 0.35; control group n = 27, intervention group n = 26.