Table 4.

Hierarchical regression model on criterion variables of Secondary Traumatic Stress and Posttraumatic Growth.

Predictors	Model 1				Model 2
	Secondary Traumatic Stress				Posttraumatic Growth
Step 1: Control	Standardized β				Standardized β
Sex	0.084	0.106	0.050	0.039	−0.054	−0.069	−0.103	−0.069
Centre	0.091	0.067	0.051	0.055	0.349 ***	0.361 ***	0.389 ***	0.399 ***
STS T1	0.534 ***	0.490 ***	0.402 ***	0.410 ***	−	−	−	−
Step 2: variables T1
Workload		0.054	−0.001	−0.009		−0.065	−0.089	−0.023
Fear contagion		0.081	0.038	0.057		0.183 *	0.214 **	0.182
Lack staff/PPE		−0.012	0.013	0.002		−0.145	−0.109	−0.089
Harmonious passion		−0.123	−0.044	−0.042		0.159 *	0.065	0.054
Step 3: variables T2
Workload			0.203 **	0.207 **			0.007	0.027
Fear contagion			0.187 **	0.192 **			0.247 **	0.241 **
Lack staff/PPE			0.130 *	0.119			−0.053	−0.026
Harmonious passion			−0.195 **	−0.192 **			0.191 *	0.210 *
Step 4: Moderations T2
Workload × Lack staff/PPE				0.017				0.184 *
Fear contagion × Lack staff/PPE				0.066				−0.117
Workload × harmonious passion				0.046				−0.077
Fear contagion × harmonious passion				−0.041				0.084
$R^2$	0.32	0.33	0.49	0.46	0.11	0.15	0.20	0.22
$\Delta R^2$	0.32 ***	0.01	0.16 ***	−0.03	0.11 ***	0.04 *	0.05 **	0.02

Note: STS = Secondary Traumatic Stress; PPE = Personal Protection Equipment; T1 = first wave of COVID-19 (April 2020); T2 = second wave of COVID-19 (December 2020); Sex was codified as 0 = male and 1 = female; Centre was codified as 1 = hospital and health centers and 2 = nursing homes; R² = Percentage of explained variance by the inclusion of variables; *** p < 0.001; ** p < 0.01; * p < 0.05.