"the extent of changes" is a correct and usable phrase in written English.
It refers to the degree or amount of changes that have taken place. Example: The new management team was shocked by the extent of changes that had been made to the company's operations.
Fresh speculation about the extent of changes has triggered a joint statement by community leaders expressing their "vehement opposition".
The Republican said differences also remained over the extent of changes in the social programs.
In the long run the extent of changes in demand and supply is usually greater.
Table 3 shows the extent of changes in the pastoral resources between the study periods.
Individual systems were characterized by the extent of changes in pH value, iron breakthrough, MB breakthrough and hydraulic conductivity.
This analyses thus measured the extent of changes to all the model parameters when a respective percentage of change is applied from the given baseline salinity values.
Objective: To determine the extent of changes in women's sexual functioning and well-being during the menopausal transition and the relationship to hormonal changes.
We measured the extent of changes in MI along the esophagus and show that the device to assess MI can be used to diagnose patients with GERD.
The extent of changes in plant diversity over time was determined by both historical and recent hedgerow management, but these management effects varied with plant life-history attributes.
Between 1987 and 2003, the extent of changes in the cultivated land was considerably increased at a rate of 72.49 % annually, from 0.3%% cover of the landscape in 1987 to 1.1%% in 2003.
The extent of changes in the landmark and the linear and angular variables between the T1 and T2 stages were measured by a single operator using Ondemand program (Tables 3 and 4).
