*3.6. Precaution Standards*

The MIPs possess excellent knowledge with a pooled effect size of 0.87 (0.77, 0.97). Considerable heterogeneity is present among the studies included, with I2 of 96.96% and *p* ≤ 0.001 (Figure 4).

In the present review, the medical imaging professional shows good knowledge, with a pooled effect size of 0.76 (0.44, 1.07). Considerable heterogeneity is present among the studies included, with I2 of 98.91% and *<sup>p</sup>* ≤ 0.001 (Figure 5).

**Figure 4.** MIPs' knowledge of "Precaution standards to protect the patients and the HCPs". (Marie et al., 2008 [32], Abdelrahman et al., 2017 [25], Duminda et al., 2014 [29]).

**Figure 5.** MIPs' knowledge of "Invasive procedures increase the risk of HCAIs". (Marie et al., 2008 [32], Abdelrahman et al., 2017 [25], Duminda et al., 2014 [29]).
