The phrase "progressively strict" is correct and usable in written English.
You can use it to describe a situation where standards or measures become more severe as time goes on. For example, "The school board has implemented progressively strict measures to improve student attendance."
* Includes patients not meeting the protocol-specified, progressively stricter glycemic rescue criteria and/or not meeting the investigator's expectations of glycemic improvement.
Many studies in this analysis included open-label glycaemic rescue therapy, which was to have been initiated based upon progressively stricter, protocol-specified hyperglycaemia criteria.
†Includes patients not meeting the progressively stricter, protocol-specified, glycemic rescue criteria and/or not meeting the investigator's expectations of glycemic improvement.
Glycemic rescue therapies included metformin, a thiazolidinedione, a sulfonylurea, or an insulin dose increase (in the add-on to insulin study), and were to have been initiated based upon progressively stricter, protocol-specified hyperglycemic criteria.
Since the 1960s, the smoking environment has been characterised by a series of external shocks as regulations and limitations have become progressively stricter, and the level of knowledge about harms from smoking has increased.
The prohibition becomes progressively less strict, however, for the medium and lower grades of the service.
Nowadays the lubricating market is demanding new biodegradable or more environmentally acceptable products based on renewable resources as a consequence of progressively more strict environmental regulations.
Since these successive analyses, more strict transfusion criteria have been progressively adopted by neonatal intensive care units (NICUs) in France and other countries, and the indications for treatment with EPO have been progressively restricted [ 18].
The goal, they say, should be a broad dialogue under which, in a phased process, Iran would agree to confine itself to limited enrichment for a peaceful nuclear program under strict international monitoring as sanctions were progressively lifted.
Since strict rules about alcohol seem to prevent adolescents from starting to drink early and progressively more [ 34– 36], the 'high spirits' appear to be at the highest risk and the 'ordinary sobers' at the lowest risk of heavy drinking.
