"medium attendance" is correct and usable in written English.
You can use it to refer to a level of attendance at an event or gathering. For example: "The medium attendance at the party was due to the bad weather."
23 In our study, the average training adherence was medium with 66% attendance over the 20 weeks.
In a previous group that evening, a medium had been in attendance, and had sensed a very angry presence, so things sound promising.
What this may imply for a screening programme in terms of ultimate intention to treat analyses on incidence of colorectal cancer and mortality reduction may depend on the attendance rate (low, medium, high).
The attendances for large, medium and small centers are 250-300, 150-200 and 100-150 perients per day respectively.
Indeed, back in the 1950s, when the new medium of television was cutting heavily into film attendance, the movies became tactically, defensively expensive in order to be what TV wasn't: huge, colorful, sumptuous, stereophonic.
The maintaining factors for the pattern of regular attendance and both short-term and medium term goals for treatment will also be assessed thematically.
To avoid shelling out the bucks for a private reading, many visitors go to free group readings with several mediums and as many as 100 people in attendance.
Educational levels were based on years of school attendance and reported as: low (1 9 years), medium (10 12 years), and high level of education (≥13 years).
A record of recent attendance increased in people in high and medium-risk categories, but decreased in people at low or undetermined-risk.
These hospitals are of medium size, with a joint annual Accident and Emergency new attendance of 112,000.
