Table 2. Outcome measures.
| All participants (n=55) | Control group (n=28) | Intervention group (n=27) | P-value | |
|---|---|---|---|---|
| Primary outcomes | ||||
| OSCE 1 checklist scorea (conventional ophthalmoscope) | 18.8 (17.7–19.8) | 18.4 (17.2–19.7) | 19.1 (17.5–20.7) | 0.515b |
| OSCE 2 checklist scorea (teaching ophthalmoscope) | 18.7 (17.8–19.6) | 17.6 (16.2–19.0) | 19.8 (19.0–20.7) | 0.012b |
| SD of OSCE 1 | 3.8 | 3.4 | 4.3 | 0.517c |
| SD of OSCE 2 | 3.4 | 3.8 | 2.3 | 0.012c |
| Secondary outcomes | ||||
| OSCE Station 1 Examiners' global impression | ||||
| Graded as ‘exceeding' by both examiners | 0 | 0 | 0 | |
| One grade ‘exceeding', one ‘satisfied' | 6 | 3 | 3 | |
| Graded as ‘satisfying' by both examiners | 29 | 12 | 17 | |
| One grade ‘satisfying', one ‘unsatisfying' | 17 | 13 | 4 | |
| Graded as ‘unsatisfying' by both examiners | 3 | 0 | 3 | |
| At least one ‘unsatisfying' grade | 20 (36.3%) | 13 (46.4%) | 7 (25.9%) | 0.11d |
| OSCE Station 2 Examiners' global impression | ||||
| Graded as ‘exceeding' by both examiners | 2 | 0 | 2 | |
| One grade ‘exceeding', one ‘satisfied' | 3 | 2 | 1 | |
| Graded as ‘satisfying' by both examiners | 33 | 11 | 22 | |
| One grade ‘satisfying', one ‘unsatisfying' | 0 | 0 | 0 | |
| Graded as ‘unsatisfying' by both examiners | 17 | 15 | 2 | |
| At least one ‘unsatisfying' grade | 17 (30.9%) | 15 (53.6%) | 2 (7.4%) | <0.001d |
| Self-reported student confidence | 6.1 (5.6–6.5) | 4.9 (4.4–5.3) | 7.3 (6.8–7.8) | <0.001b |
| Student-reported ‘usefulness of feedback' | 8.2 (7.8–8.7) | 8.2 (7.7–8.8) | 8.3 (7.6–8.9) | 0.92b |
Data presented as mean (95% confidence intervals) or numbers (percentages).
a
Checklist score marked out of 24.
b
P-value calculated according to independent t-test.
c
P-value calculated according to Brown–Forsythe test.
d
P-value calculated according to χ2-test. P<0.05 considered significant and displayed in bold.