Table 10.10 reports that the 95% CI for the odds ratio of a recurrent haemorrhoid at 12 months between males and females, after adjustment for age, previous treatment and group is:

0.77 to 1.90.

Which ONE of the following statements is CORRECT?

A. The above 95% CI contains the true population odds ratio for a recurrent haemorrhoid at 12 months between males and females, after adjustment for age, previous treatment and group.

B. The 95% CI, for the odds ratio, is calculated as ±3 SEs away from the odds ratio for a recurrent haemorrhoid at 12 months between males and females.

C. There is a probability of 0.95 that the population odds ratio for a recurrent haemorrhoid at 12 months between males and females, after adjustment for age, previous treatment and group lies between 0.77 and 1.90.

D. The 95% CI for the odds ratio for a recurrent haemorrhoid at 12 months between males and females, after adjustment for age, previous treatment and group is statistically significant and potentially clinically important.

E. The above 95% CI is likely to contain the true population odds ratio for a recurrent haemorrhoid at 12 months between males and females, after adjustment for age, previous treatment.

Table 10.10

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Variable Group (0 = RBL, 1 = HAL) Age (years) Sex (0 = female, 1 = male) Previous treatment? (0 = no, 1 = yes) 0.425 0.257 1.657 b Odds 95% CI for OR SE(b) Wald z P-value Ratio Lower Upper -0.798 0.231 WWWW XXXX -0.003 0.009 -0.298 0.766 0.189 0.23 0.822 YYYY ZZ ZZZZ 1.00 0.98 1.02 0.411 1.21 0.77 1.90 0.098 1.53 0.93 2.53 Constant -0.128 0.47 -0.271 0.786 0.88