Table 2: Knowledge and skills scores of the two groups at different time points.

Variable

In-service nurses mean (SD)

Preservice students mean (SD)

Mean difference (95% CI); value

Change from T1 to T2 between the groups; adj. mean difference* (95% CI); value

(1) Knowledge scores

Initial (T0) Median (range)

6.6 (2.6)^{1i}

5.8 (1.5)^{1p}

0.86 (−0.1 to 1.8); 0.08

—

Immediately after training (T1) Median (range)

11.5 (1.9)^{2i}

11.3 (2)^{2p}

0.24 (−0.6 to 1.17); 0.60

0.06 (−0.87 to 0.98); 0.90

6 weeks after training (T2) Median (range)

10.5 (2.4)^{3i}

9.1 (2)^{3p}

1.44 (0.33 to 2.54); 0.01

Interaction between change in scores from T1 to T2 and designation

(2) Skill scores

Initial (T0) Median (range)

3.2 (2.3)^{1i}

6.5 (1.6)^{1p}

−3.27 (−4.3 to −2.23); <0.001

—

Immediately after training (T1) Median (range)

10.7 (1.3)^{2i}

10.1 (1.1)^{2p}

0.54 (−0.11 to 1.19); 0.10

0.91 (−0.08 to 1.91); 0.07

6 weeks after training (T2) Median (range)

7.4 (2.6)^{3i}

9.8 (1.6)^{3p}

−2.4 (−3.43 to −1.34); <0.001

Interaction between change in scores from T1 to T2 and designation

SD: standard deviation; CI: confidence interval.
*Adjusted for baseline (T0) values using generalized estimating equation (GEE)—population averaged model. 1i-, 2i-, and 3i-proportion of in-service nurses evaluated at T0, T1, and T2 were 28, 28, and 22, respectively. 1p-, 2p-, and 3p-proportion of preservice nurses evaluated at T0, T1, and T2 were 46, 46, and 43, respectively.