In one sentence
Training new operating-room nurses with three timed reviews — at 24 hours, 7 days, and 30 days — held clinical scores steady a month later, while a conventional review group slipped back.
What the researchers did
Zhang and colleagues ran a pilot randomized controlled trial with 30 novice surgical instrument nurses learning knee arthroplasty procedures (April 2021–April 2024). Fifteen nurses received conventional review teaching; the other fifteen followed a forgetting-curve schedule with structured knowledge and skills reviews at 24 hours, 7 days, and 30 days after initial training.
Both groups started from similar baseline clinical assessment scores (roughly 64–65 out of 100). Researchers compared training assessment scores one day and one month after the program, plus satisfaction ratings from surgeons and from the nurses themselves. The trial was registered retrospectively in the Chinese Clinical Trial Registry (ChiCTR2600119024).
What they found
- One day after training, both groups improved sharply (intervention ~90.3, control ~85.4).
- One month later, the intervention group stayed near peak (
89.9), while the control group dropped (75.3) — a statistically significant decline from their day-one scores. - At one month, forgetting-curve nurses scored higher than controls (89.9 vs 75.3).
- Surgeon satisfaction with nurse cooperation was higher in the intervention group (91.4 vs 85.1).
- Nurse satisfaction with teaching also favored the spaced-review approach in this sample.
What this means for learners and educators
- In procedural skills, a single intensive cram session may look successful next day but fade within weeks without spaced reinforcement.
- A practical template: initial teaching, then review at 1 day, 1 week, and 1 month — aligned with classic forgetting-curve spacing rather than ad-hoc refreshers.
- Clinical educators can build short return visits into onboarding instead of assuming one workshop is enough.
- Even small teams (n=15 per arm here) can pilot spaced schedules before scaling — track whether skills hold at 30 days, not only immediately post-course.
Limitations and what we don't know yet
This was a small, single-setting pilot in one surgical specialty — results may not generalize to other departments or countries. Registration was retrospective, which limits transparency about pre-specified outcomes. The comparison is conventional review versus a structured spaced plan, not spaced review versus no review at all. Longer follow-up beyond one month and objective performance measures beyond assessment scores would strengthen the case.