The phrase "and while the proportion" is correct and usable in written English.
It can be used to introduce a contrast or a condition related to a proportion in a discussion or analysis.
Example: "The study showed an increase in productivity, and while the proportion of satisfied employees rose, the overall morale remained low."
Alternatives: "and although the ratio" or "and even though the percentage".
Ethnibus™ uses quota sampling and while the proportions of each ethnic group were representative of the UK, it seems unlikely that the people who were willing to participate in the survey are representative of those who may have declined the invitation to be interviewed.
In this nationwide cohort study, we found a significant increase in the proportions of patients with NSTEMI and unstable angina receiving a CAG and PCI in Denmark between 2001 and 2009, while the proportion receiving CABG decreased.
In contrast, the proportion performed between 39 and 40 weeks increased from 39%to63%3% between April 2000 and February 2009, while the proportion of elective CS deliveries done between the 37th and 39th week of pregnancy decreased from 49%to30%0%.
The density of bulls and the proportion of the population with higher education were significant both for occurrence and incidence, while the proportion of fresh water, cultivated land, and the proportion of low income households with children were significant for the incidence of the disease.
These differences were associated with a significantly higher frequency of PI+ cells in hypoxic conditions on days 3, 4, 5 and 7, while the proportion of AnV+ PI- cells was similar for both conditions and never higher than 10% of the total population.
Crime count experienced by the top percentile dropped by 5percentnt between the years 1996 and 2000 while the proportion of victimisations increased by 13percentt in the same time period.
The share of transport by ship declined between the years 2007 2008 for the export of pulp and paper, while the proportion fell steadily for sawn timber (see Table 7).
As the proportion of general dentists has declined, so has the proportion entering academics and research, while the proportion of specialists has increased [ 3].
Thus, the proportion of articles from the UK was highest in the two journals published in the UK (BMJ and Lancet) while the proportion of articles from the USA was highest in the three journals published in the USA.
For example, in the UK CHIC study, the proportion of treatment regimens that included stavudine dropped from 29.4%to0.8%8% between 2002 and 2009, while the proportion that included zidovudine dropped from 47.9%to8.8%8% over the same period.
