The phrase "at a mean interval" is correct and usable in written English.
It can be used in contexts where you are discussing measurements, statistics, or timeframes that are averaged out over a specific period.
Example: "The data was collected at a mean interval of two hours to ensure consistency in the results."
Alternatives: "at an average interval" or "at a typical interval".
Seven out of 42 patients underwent revision surgery at a mean interval of 46.4 weeks without any significant difference between the two groups (p = 0.512, Table 5).
In a study by Lermite et al., liver recurrences were diagnosed at a mean interval of 15 months post-hepatectomy and extrahepatic recurrences at 22 months [6].
The traffic density was low with no traffic in the same lane and random oncoming traffic at a mean interval of 22 s.
The data suggest that spruce forest sites in the area burned at a mean interval of a few centuries over a period of almost 6000 years prior to the beginning of slash-and-burn cultivation in the area.
However, their study reported on sICAM-1 levels determined 20 years after delivery, whereas our data represent samples collected at a mean interval between delivery and enrolment of 0.7 years (range 0.5 to 8.5 years).
These first recurrences occurred at a mean interval of 51 months after baseline treatment.
Of them, 32.0% had persistent HR-HPV at Year 2 after a mean interval of 16.9 months (SD 1.7).
In seven of 17 remaining patients, stimulation was performed on at least two occasions with a mean interval of 51.4 ± 35.1 (SD) h between measurements.
Of the 8 incidence cancers, 5 were diagnosed at the second MRI examination, with a mean interval of 3.3 years (range, 2-5.5 years).
The cancers occurring in BRCA1/ BRcarriersiers occurred at a mean time interval of 9.6 years following the initial diagnosis.
5-Aminolaevulinic acid (ALA -induced porphyrin biosynthesis, which is used for ALA -inducedotodynamic theraporphyrinDT), was studied in tissues of 10 patients with biosynthesissophagus (BE) and adenocarcinoma of the oesophagus (AC) undergoing oesophagectomy at a mean time interval of 6.7 h after the ingestion of ALA (60 mg kg–1).
