And, interestingly, there was a more than 5-year time window between first occurrence of symptoms and professional diagnosis, approximately 2 years longer than observed, e. g., in the child study conducted in parallel [ 37].
The cross-sectional nature of the study cautions against drawing a direct causal link between the first occurrence of GBV and the timing of onset of the mental disturbances measured.
Currently, there is an unacceptably long delay, from 5 to 10 years, between the first occurrence of AS symptoms and a diagnosis of AS [ 10, 11].
The first phase of the analysis, which is ongoing, consists of a semiparametric model to study the association between the first occurrence of parasitaemia and the existence of an infected placenta at delivery.
Patients reported between 1 and 15 depressive episodes (M[SD] = 5.6[5.5]) and their age at first occurrence of depression was between 8 and 40 years (M[SD] = 19.3[8.2]).
For the entire patient sample, the mean time span between first occurrence of symptoms (parent report) and first professional diagnosis amounted to approximately 5.5 years.
The failure event was the observation of a particular sign in an animal and the survival time was measured from challenge to the first occurrence and between subsequent occurrences.
Interestingly, subsequent blood measurements showed a normalization of the percentage eosinophils in the three months between the first occurrence of liver lesions on CT and second CT with diminishment of these liver lesions and eventually calcification.
Follow-up time was calculated as the number of days between the date of baseline questionnaire completion and the first occurrence of a first diagnosis of endometrial cancer.
"Time at risk" of mastitis was defined as days between birth and first occurrence of mastitis (for women who developed mastitis) and days between birth and the last study time-point (for women who did not develop mastitis).
We defined "time at risk" of mastitis as days between birth and first occurrence of mastitis (for women who developed mastitis) and days between birth and the last study time-point (for women who did not develop mastitis).
