The phrase "a four month duration" is correct and usable in written English.
It can be used when specifying the length of time something lasts or is expected to last.
Example: "The project will take a four month duration to complete, so we need to plan accordingly."
Alternatives: "a four-month period" or "a duration of four months".
For analyses presented in Tables 6 and 7, a six month duration was assumed based on other data showing that the duration of effect of education-oriented adherence interventions may range up to eighteen months [ 50, 51].
Chown et al. [ 17] compared osteopathic intervention to group exercise and physiotherapy; the primary outcome was the Oswestry Disability Index (pain intensity and effects on daily living); provided five treatment sessions to be undertaken within a three month duration; and assessed the difference between baseline and 6 weeks; and six weeks and follow-up at 72 79 weeks.
The diagnosis of IMN was established on the basis of bilateral pedal edema (four month duration), serum albumin, 2.1 g/dl, serum cholesterol, 440 mg/dL, 24 h-proteinuria, 10.4 g/24 h and renal biopsy findings of MN.
The most common reasons for exclusion were the presence of an exclusionary comorbid condition which preceded illness onset (12/27, 44%), a symptom duration of less than 6 months (7/27, 26%), and a greater than six month duration between exposure and subjective illness onset (7/27, 26%, mean time to onset of illness 3.5 years, range 2.1-5.5 2.1-5.5 years
A major limitation of our study was the relatively short three month duration of our intervention period.
In between visits, the physiotherapist will contact participants by telephone (five phone calls during the six month duration).
The pre-test post-test results indicated that older person's perceptions' of their health was relatively stable over the six month duration of this study.
The elevated dextrose on admission was attributed to glycemic dysregulation rather than from new onset diabetes given the two month duration of fever and symptoms prior to hospitalization.
These authors concluded that between 14 and 42percentt of the whiplash patients developed chronic complaints (over six month duration), and that 10percentt of those patients had constant severe pain.
