Furthermore, if the results are used in subsequent investigations, the only consequence is a slightly smaller sample size.
A slightly smaller sample size would be required for the outcome measure preterm delivery (gestational age <37 weeks), which occurs in 8% of pregnancies.
As both questionnaires have been previously validated in German, the slightly smaller sample size than no. of items × 5 in this study can still be considered sufficient, in particular considering the rarity of PXE [ 33].
Method 1 has given us a slightly smaller sample size estimate than Method 2. The two methods can be regarded as equivalent when the two populations are Normally distributed, with equal variances.
Whilst similar recruitment methods were employed in both surveys, a slightly smaller sample size was achieved in study 2 (284 versus 235) despite a growth in the overall population of nurses working in general practice.
On the other hand, the multivariate model supported the univariate conclusions that the occupations of officials/clerks were a risk factor for infection with GI variants other than GII, though the power of the logistic model might be slightly compromised because of the small sample size of GI cases.
It is necessary, however, to view these results with caution due to our small sample size and slightly higher participant exam scores compared with the actual exam scores for the class as a whole.
Both tests are conservative and may slightly underestimate the significance of differences between groups having a small sample size.
Compared to laparoscopic diagnosis, however, the performance of TVS is slightly poorer, but not statistically significant different, probably due to the small sample size (n = 2).
The slightly lower frequency of expression in established GBM xenografts (57%) may be preliminary due to the small sample size (7 cases).
