The phrase "about the same extent" is correct and usable in written English.
It can be used when comparing two or more things to indicate that they are similar in degree or scope.
Example: "The two proposals are about the same extent in terms of their potential impact on the community."
Alternatives: "roughly the same degree" or "approximately equal in scope."
Expression of HMGB1 increases by about the same extent when estrogen-responsive breast cancer cells are treated with estrogen [ 43] or synchronized Chinese hamster ovary cells progress from the G1 to the S phase [ 44].
Development of the CBA sarcoma was inhibited to about the same extent if, instead of treating the mouse with C. parvum, the tumour cells were pre-incubated with anti-tumour globulin (ATG) in the absence of complement prior to inoculation, and the effect of combining these procedures was much greater than that of either alone.
They differ from each other to about the same extent as the modern Romance languages.
The safety of trans (as opposed to naturally occurring cis) unsaturated fatty acids has been called into question because trans-fatty acids in the diet raise LDL cholesterol to about the same extent as do saturated fatty acids, and they can also lower HDL cholesterol.
Introduction of the N15D substitution into VPRΔC improved the thermal stability further by about 3 °C, or to about the same extent as in the wild type.
This was still about the same extent (green outline; cover of 76 ha) as during the forest survey in July-August 2010. July-August 2010
We find that mutagenesis in the umuDC strain requires dinB to about the same extent as the wild-type (Figure 1I and Table 1) indicating that there was no subtle effect of the absence of Pol V, such as changing the DNA polymerase responsible for the frameshift reversions measured in this assay.
Raising insulin about 10-fold to a postprandial concentration (∼53 mU/l) increased p70S6k phosphorylation to about the same extent as doubling blood amino acid concentrations but without increasing activity of an index of eukaryotic initiation factor (eIF -4E-BP1 (15).
Her brother, Morris Margolies, 80, a retired rabbi who lives in Leawood, Kan., is not haunted by dementia to the same extent, but he thinks about it.
Mr. Romney's strength among Mormon voters could be of some benefit in Colorado, but probably not to the same extent as in Nevada: about 2.2 percent of Colorado's general population is Mormon, versus 5.9 percent in Nevada.
There was also some indication that respondent, friend, or relative experience with IPV is associated with preparedness, but not to the same extent as having talked about IPV with abused women.
