Sentence examples for made comparisons difficult from inspiring English sources

Also, strong growth in the same quarter last year made comparisons difficult.

A large variability in epidemiological designs and methodologies used for assessing exposure and outcome was observed across the different studies, which made comparisons difficult.

Another F.D.A. food safety official, Nancy S. Bufano, said that despite the success of vaccination in Britain, the agency thought that because the vaccines used in the two countries were not identical, it made comparisons difficult.

Published population-based studies have used variable methodology, which has influenced findings and made comparisons difficult.

When SF-36 was used, the scales scores were not normalized, which made comparisons difficult.

The variation between the studies in definitions and methods used for data collection made comparisons difficult.

Methodologies differed markedly between studies, which made comparison difficult.

Recall bias and lack of research in Ethiopian context made comparison difficult.

However, large differences between countries and variations from year to year within each country made comparison difficult.

Heterogeneity of study designs and definitions makes comparisons difficult.

Continual revision of Ofsted's frameworks makes comparisons difficult and judgments inconsistent, she says.