1.   Profitability ratios are very encouraging, with both the overall level and trend of earnings looking positive.

2.   The arterial-alveolar oxygen tension ratio is a useful prognostic indicator.

3.   The hydrogen-to-carbon atom ratio is perhaps a better index.

4.   The ratio was slightly lower than that achieved by the industry before nationalisation, but it was not Markedly out of line with other countries.

5.   Therefore the platelet-aggregate ratio would be low in the presence of circulating platelet aggregates.

6.   These ratios are most helpful when income is constant.

7.   The above ratios are useful in managing the company.

8.   Since the amount of information to be conveyed remains much the same this means that the signal-to-noise ratio will be worse.

9.   On a molecular level, the ratio is then a measure of the average volume of the polymer relative to that of the holes.