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Table 4 Means (range: 1-4) of perceived self-efficacy items with repeated measures

From: A school-based educational on-site vaccination intervention for adolescents in an urban area in Germany: feasibility and psychometric properties of instruments in a pilot study

Measure

Perceived self-efficacy items (schools 1 and 3) Linear mixed models for each item

(imputed perceived self-efficacy items, covariates: age, gender, SES)

Condition

Pre-educational unit

Post-educational unit

Mean

(CI)

N students,

classes, schools

Mean

(CI)

N students,

classes, schools

ITEM 1 Why do I need vaccinations

3.4

(3.3–3.5)

287, 14, 2

3.5

(3.5–3.6)

291, 14, 2

ITEM 2 Which vaccinations do I need

2.7

(2.6–2.8)

287, 14, 2

3.2

(3.1–3.3)

291, 14, 2

ITEM 3 Trustworthiness of information (media)

2.5

(2.4–2.6)

287, 14, 2

2.9

(2.8–3.0)

291, 14, 2

ITEM 4 Advice from friends and family

3.0

(2.9–3.2)

287, 14, 2

3.1

(3.0–3.3)

291, 14, 2

ITEM 5 Advice from media

2.7

(2.6–2.9)

287, 14, 2

3.0

(2.9–3.2)

291, 14, 2