This was a non-significant difference.

However, high variability in densities between the replicated tows in each of the depth intervals resulted in statistically non-significant differences between day and night periods for each of the depth intervals.

As Table 3.5 makes clear, establishments where output is currently falling appear to be less likely to make use of fixed-term contract workers, although there is only a small, non-significant difference in this respect between establishments with rising and with stable output.

We have shown that in over 110000 deliveries there are only small, non-significant differences in perinatal mortality rates between hospitals when the place of booking is considered and that these are further reduced when adjustments are made to allow for the risk factors known at booking.