Sentence examples for difficult to ascertain in from inspiring English sources

The effect size is small and often difficult to ascertain in individuals.

For the studies on the energy payback time and greenhouse gas footprint of PV module production, it is sometimes difficult to ascertain in retrospect whether the studies were performed using a consistent method, especially for the older studies selected here.

The only relevant domain identified by most guidelines and textbooks was a lack of response or a loss of effectiveness, both of which can be difficult to ascertain in the course of a progressive condition.

The difference in patient-reported outcomes between study arms can often be difficult to ascertain in randomized controlled trials (RCTs) using a parallel design because of wide interindividual variations in baseline characteristics and how patients interpret the outcome measures.

Whether renal lesions found in non albuminuric CKD are specifically due to diabetes or may in part recognize different pathogenetic mechanisms is sometimes difficult to ascertain in clinical practice as renal biopsies are not routinely performed in most of these patients.

In contrast, the hybrid forms were relatively rare or difficult to ascertain in the Indonesian population located in North Sulawesi, as in the two coastal river populations in northeastern Australia, the Embley River (ER) and the Johnstone River (JR) of Queensland.

However, the postnatal role of those pathways that are essential for initial mammary development may be difficult to ascertain if, in their absence, the embryonic mammary rudiment fails to form in the first place, thus necessitating the use of conditional approaches.

13 As study designs have varied, it is difficult to ascertain if limitations in quinine effectiveness in some studies were due principally to true drug resistance, varied pharmacokinetics, poor compliance with a seven day regimen, or a combination of these factors.

However, the true incidence rates are often difficult to ascertain, due in part to difficulties in obtaining death certificates as well as the accuracy on the certificate itself (SCD is often unwitnessed).

This low attributable mortality and the patient's primary diagnosis requiring mechanical ventilation make it difficult to ascertain differences in outcomes beyond clinical success in patients with VAP.

14 16 These indicators are easier to capture partly because maternal death is difficult to ascertain, especially in rural areas, or may occur in small catchment areas with low numbers over a short evaluation timespan.