"of unknown timing" is correct and usable in written English.
You can use it when one is uncertain of the exact timing of a particular event. For example, "The arrival of the cargo ship is of unknown timing."
These models partition the time-related variation in obesity to the three distinct sources but cannot identify the specific environmental channel within the source.33 A key feature of the analysis is statistically testing for a structural break of unknown timing across cohorts and checking the robustness of their finding by additionally controlling for family fixed effects.
At age 18-month, 107 children were HIV-1 infected of whom 30 (28%) were postnatal transmission cases (two in the formula-fed groups), 70 (68%) were peripartum infections and seven (7%) remained of unknown timing.
Unexplained antepartum, neonatal, and deaths of unknown timing are classified in subcategories of code 8 Unknown, unexplained and unclassifiable causes of death (abbrev: Unknown).
Now presence of an unknown timing offset will affect the performance of any spectrum sensing algorithm.
We found uNGAL to be a useful early AKI marker that predicted development of severe AKI in a heterogeneous group of patients with unknown timing of kidney injury.
Urinary NGAL can be considered an early AKI marker in a heterogeneous group of critically ill paediatric patients with unknown timing of kidney injury.
For the analyses, three dummy variables were created and coded as 1 if applicable: "early initiation of breastfeeding" (within an hour after birth) [ 33], "unknown timing of breastfeeding initiation," and "never breastfed".
Many studies report no correlation between higher p,p´-DDE levels in aged women and breast cancer risk (Lopez-Cervantes et al. 2004; Shakeel et al. 2010; Snedeker 2001); however, the unknown timing of initial exposure and the levels of exposure at younger ages may obscure evidence of DDT's impact in older women.
We excluded infants not tested for HIV infection, with unknown timing of infection or infected during the peri-partum period, and with unknown or imprecise infant feeding practices (at least one recall history missing in the first 2 weeks of life) or formula-fed from birth.
For those with HBV after HIV, 24% of infections were CHBV compared with 12% for all other HBV infections (i.e. those diagnosed concurrently with HBV and HIV, and those with unknown timing of HBV infection relative to HIV) (p<0.0001) (Fig. 2A).
Patients with unknown timing of statin use and who were not apparent statin users according to the History and Physical section of the EMR were excluded to avoid the confounding effect of statin and adjuvant treatment.
