Table 3.

Predictive factors for higher knowledge scores at time point 1

	Univariable analysis		Multivariable analysis
	Coefficient (95%CI)	P value	Coefficient (95%CI)	P value
Female gender	1.12 (0.39–1.85)	.003	1.07 (0.36–1.78)	.003
Study group		<.001
- No-intervention group	Ref.		Ref.
- Video group	1.86 (1.14–2.58)		1.81 (1.10–2.52)	<.001
- SOP group	0.55 (−0.17–1.27)		0.46 (−0.26–1.16)	.201
Familiarity with UHZ hygiene concept	1.15 (0.31–1.99)	.007	0.89 (0.08–1.70)	.032
Profession		.065
- Physicians	Ref.
- Nurses	0.85
- Other professions	0.48
Work experience (in years)		.471
- < 1	Ref.
- 1–5	0.11 (−1.32–1.10)
- 5–10	0.55 (−0.73–1.84)
- > 10	0.29 (−0.89–1.47)
Working at UHZ (in years)		.086
- < 1	Ref.
- 1–5	0.10 (−0.73–0.93)
- 5–10	1.12 (0.12–2.11)
- > 10	0.45 (−0.52–1.42)

Abbreviations: CI confidence interval, UHZ University Hospital Zurich, Ref Reference group, SOP standard operating procedure