1.   To improve precision, it is usual to date several samples from the same archaeological level to determine the mean age.

2.   In our series, the mean age was higher, and the male to female ratio was lower than reported, but still indicated a male predominance.

3.   The distribution of twins in concordant and discordant twin pairs, and the number of twins with an ileostomy, are shown in Table I.

4.   The mean age at diagnosis was similar in both groups.

5.   The mean age of their population, however, was high and the results cannot be extrapolated to other patient groups.

6.   Fifty three were women and the mean age was the same for men and women.

7.   The mean age increased together with the severity of the oesophageal injury.

8.   The mean age, sex, body mass index, and skin distance were not significantly different.