Table 9: RT analysis of variance of frequency of surgical microscope use (mean ± SE); = statistically significant.

DH
(ms)
NDH
(ms)
Difference
(ms)
DF
(ms)
NDF
(ms)
Difference
(ms)

Use of surgical microscope
 No9318 ± 18328 ± 20−10 ± 12346 ± 18351 ± 19−4 ± 14
 Assisting7312 ± 19313 ± 21−1 ± 14322 ± 19338 ± 20−16 ± 15
 Every month8305 ± 17352 ± 19−47±12319 ± 17334 ± 18−14 ± 14
 Every week19315 ± 12322 ± 13−7 ± 9313 ± 12335 ± 13−21 ± 10
 Every day4288 ± 24305 ± 26−18 ± 18308 ± 24309 ± 26−1 ± 19
-test, 4 df0.360.802.230.580.420.35
ANOVA 0.840.530.080.680.790.85
Test for trend0.520.630.920.170.280.76