The phrase "doubtful quality" is correct and usable in written English.
It can be used to describe something that is of uncertain or questionable standard or value.
Example: "The product was advertised as premium, but upon inspection, it was clear that it was of doubtful quality."
Alternatives: "questionable quality" or "inferior quality."
The Internet contains a large amount of useful information on many subjects, but also information of doubtful quality.
They point to the many hedge funds of doubtful quality, with inexperienced managers or even charlatans at the helm.
The authors simply dismiss the analysis as being "of doubtful quality" and repeat a characterization of Mr. Tuerck as "a right-wing economist for hire".
"But what's strange is that many people look for Italian instruments of doubtful quality in the range of one or two hundred thousand dollars, which is a lot of money and very little value".
In 1929, the Los Angeles Times explained honky tonks thusly: "In these establishments, which were often of enormous size, much liquor was dispensed at the tables which crowded the floor, and entertainment of doubtful quality was given on a stage at one end of the room".
Indeed, arguably the opposite is happening as Fannie Mae and Freddie Mac, the two nationalised mortgage agencies, seek to compel banks to buy back loans of doubtful quality they had sold to the agencies.There are, in theory, many ways to hasten recovery after a crisis.
Thus, at the same time that the medical establishment warns against overweight as a threat to health, the consumer and medical economy is inundated with food products of doubtful nutritional quality, diet plans, weight loss drugs and weight loss surgery.
Get an independent second opinion if you are told that you have a life-threatening condition or that surgery is needed to correct a problem, or if you are doubtful about the quality of tests that were done.
However, it remains doubtful if increased quality of RC predictions would have led to different conclusions from these analyses about the clinical significance of RC.
– Doubtful fusion: suboptimal quality of bone bridging or some doubtful discontinuity, including fusion mass possibly hidden behind instrumentation, at a minimum of one side of the spine, in the absence of "fusion" on the other side.
50 Sensitivity analyses will be undertaken in case the eligibility of some studies in the meta-analysis is doubtful (eg, low-quality studies).
