Although the volatility of phthalates is relatively low, studies have shown that phthalates are present in residential indoor air (Jaakkoala et al. 1999; Rudel et al. 2003).
The OR for preeclampsia per % increase in HbA1c was as high as 17, but due to a relatively low number of study participants the uncertainty of the estimate was large (95 % CI 2.4-115).
Additionally, our sample size was smaller than anticipated, due in part to substantial numbers of clinic patients being ineligible to participate because of language barriers (non-fluent in English) and cognitive dysfunction, and in part to a relatively low acceptance of study participation.
As a number of non AIDS-defining cancers occur with a relatively low incidence, available studies are limited to evaluate the association between cancer and HIV.
14 A relatively low number of studies met our inclusion criteria, but these strict criteria enabled us to focus on large scale high quality studies to minimise bias.
The number of studies regarding the relationship between adult cancers and miRNAs is gradually increasing; however, there are still a relatively low number of studies regarding childhood malignancies.
This sensitivity analysis revealed a smaller effect size for the studies with a relatively low risk of bias (9 studies) than for the studies with a higher risk of bias (7 studies), Hedges' g of 0.24 (p = 0.01) and 0.53 (p < 0.01), respectively.
Whether the findings were only due to the normal degenerative effect of age or also to a rather high amount of exercise, albeit at a relatively low intensity, might be studied in longitudinal studies, comparing riding school horses to privately owned horses, both with and without high-intensity work.
Based on our study using specimens from the 31 designated district tuberculosis hospitals, we report that XDR TB occurs in Shanghai, albeit currently with a relatively low prevalence during the study period.
However, NMP22 had a relatively low specificity in our study both as a single marker and in combination with other markers.
