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. 2020 Aug 17;17(16):5971. doi: 10.3390/ijerph17165971

Table 2.

Differences in knowledge, perceived knowledge, perceived safety, and personal resilience for COVID-19 between T1 and T2 (pre-post intervention).

Variable T1 T2 % Change Effect Size * (Cohen’s d) ** p-Value
Knowledge score 3.21 ± 0.78
3.0 (3.0–4.0)
3.46 ± 0.70
4.0 (3.0–4.0)
7.8% 0.34 <0.001
Knowledge perception 4.06 ± 0.51
4.0 (3.7–4.4)
4.28 ± 0.45
4.4 (4.0–4.6)
5.4% 0.44 <0.001
Perceived safety 2.58 ± 1.15
2.0 (2.0–3.0)
2.90 ± 1.16
3.0 (2.0–4.0)
12.4% 0.28 <0.001
Perceived personal resilience 3.51 ± 0.69
3.5 (3.1–4.0)
3.59 ± 0.76
3.7 (3.1–4.0)
2.5% 0.11 <0.001

Data are presented as mean ± standard deviation and median (Q25–Q75). p-value is based on paired sample t Test. Effect size *: 0.2-Small, 0.5-Medium, 0.8-Large. Cohen’s d **: appropriate effect size for the comparison between two means.