Among male students, proportions of those who never or rarely used condom declined from first graders to forth grade students (P value for trend analysis < 0.001).
Other potential confounders that have not been addressed include differences between the schools other than curriculum format or quality of implementation of the curriculum, recent curriculum changes, ethnicity of students, and proportion of students with relatives in the medical profession.
The mean of each student's proportion of time spent in MVPA during these three classes will be used as his or her baseline.
In a national survey of 45,200 students, the proportion of eighth-grade students reporting any use of Ecstasy rose to 3.1percentt in 2000 from 1.7percentt in 1999.
Of the Parma district's 13,000 students, 2,200, or about 17percentt, are identified as special-education students, a proportion similar to that in many other districts.
At this point, we asked the students: What proportion of the phenotypic variation in our population is due to genetic variation?
Among low- and middle-income students, the proportion of those who said college rankings were "very important" was only about 10percentt.
Among these students, the proportions of boys and girls are just about equal.
For A-level students, these proportions rose to 6.2% and 14.7% respectively.
The University of Leicester's medical school, where Professor Lauder is head, currently has 33% ethnic minority students, even though the proportion of students applying from an ethnic minority background is much lower.
Increased independent student work The proportion of independent student work has increased, which requires more work from teachers in the preparation of tasks and giving feedback.
