Estimating data from figures with a Web‐based program: Considerations for a systematic review

Burda, Brittany U; O’Connor, Elizabeth; Webber, Elizabeth M.; Redmond, Nadia; Perdue, Leslie A

doi:10.1002/jrsm.1232

Cited by 193 publications

(122 citation statements)

References 16 publications

Supporting

Mentioning

114

Contrasting

Unclassified

Order By: Relevance

“…Literature searches were performed using Web of Science (United States) and CNKI (China Knowledge Resource Integrated Database, China; 2000–2017) with the search terms ‘soil water’ or ‘soil moisture’ and ‘Loess Plateau.’ To avoid publication bias, the following criteria were set to select related studies: (a) at least one of the relevant vegetation types (i.e., forest, shrubland, and grassland) and a control (farmland or grassland) representing the soil moisture conditions before the land use conversion was reported; (b) the gravimetric farmland within the 0‐ to 500‐cm layer (0–100, 100–200, 200–300, 300–400, and 400–500 cm) was measured or calculated in both the control and treatments; (c) location, temperature, and precipitation were clearly recorded; (d) studies were excluded if the experiments were conducted in the laboratory. Data presented in graphical forms were extracted using WebPlotDigitizer (Burda, O'Connor, Webber, Redmond, & Perdue, ). In general, all available data from the publications were extracted, including sites, latitude (N), longitude (E), mean annual temperature (MAT), mean annual precipitation (MAP), ecological zones (EZ), slope, restoration type, land use type, species, restoration age, replications, initial soil moisture, and soil moisture after the vegetation restoration.…”

Section: Methodsmentioning

confidence: 99%

Decline in soil moisture due to vegetation restoration on the Loess Plateau of China

Shangguan

2018

Land Degrad Dev

View full text Add to dashboard Cite

Afforestation brings lots of water‐related benefits, including reducing soil erosion and improving water conservation, simultaneously; it is considered to be a land use activity, which threatens water resources security. Characterizing the response of soil moisture to revegetation is important for the sustainability of water and plants on the Loess Plateau of China. In this study, we conducted a meta‐analysis of 1,262 observations from 66 published studies to evaluate the effect of land use on the soil moisture of forest, shrubland, and grassland regions at a depth of 5 m in different ecological zones of the Loess Plateau. The results indicated that (a) Soil moisture content (SMC) decreased after land use conversion in all three ecological zones and was inconsistent among different soil layers. (b) Except for other grassland species, changes in the response size for soil moisture were not significant among any tree species, including Pinus tabuliformis, Robinia pseudoacacia, other forest species, Caragana korshinskii, other shrubland species, and Medicago sativa. (c) Soil moisture changes varied with different restoration types and ages. (d) The change in response to precipitation was not significant, whereas the change in response to temperature was significant. In addition, the responses of the initial soil moisture levels exhibited a negative correlation with revegetation. These results indicate that it is vital for scientific afforestation in the Loess Plateau to complement local climate conditions and soil properties.

show abstract

Section: Methodsmentioning

confidence: 99%

Decline in soil moisture due to vegetation restoration on the Loess Plateau of China

Shangguan

2018

Land Degrad Dev

View full text Add to dashboard Cite

show abstract

“…Usual BP values for non-BPLTTC trials were extracted by two additional researchers (A.S. and E.A.). If not reported directly, this was estimated from published graphics of BP levels over time using the webplot digitizer application [13] (http://arohatgi.info/WebPlotDigitizer/). Finally, if not available from these sources, it was taken as the BP level at end of follow-up.…”

Section: Data Extraction and Quality Assessmentmentioning

confidence: 99%

Effects of blood pressure lowering on cardiovascular events, in the context of regression to the mean

Salam

Atkins

Sundström

et al. 2019

Journal of Hypertension

View full text Add to dashboard Cite

on behalf of the Blood Pressure Lowering Treatment Trialists' Collaboration Ã Objective: To assess the clinical relevance of regression to the mean for clinical trials and clinical practice. Methods: MEDLINE was searched until February 2018 for randomized trials of BP lowering with over 1000 patientyears follow-up per group. We estimated baseline mean BP, follow-up mean (usual) BP amongst patients grouped by 10 mmHg strata of baseline BP, and assessed effects of BP lowering on coronary heart disease (CHD) and stroke according to these BP levels. Results: Eighty-six trials (349 488 participants), with mean follow-up of 3.7 years, were included. Most mean BP change was because of regression to the mean rather than treatment. At high baseline BP levels, even after rigorous hypertension diagnosis, downwards regression to the mean caused much of the fall in BP. At low baseline BP levels, upwards regression to the mean increased BP levels, even in treatment groups. Overall, a BP reduction of 6/3 mmHg lowered CHD by 14% (95% CI 11-17%) and stroke by 18% (15-22%), and these treatment effects occurred at follow-up BP levels much closer to the mean than baseline BP levels. In particular, more evidence was available in the SBP 130-139 mmHg range than any other range. Benefits were apparent in numerous high-risk patient groups with baseline mean SBP less than 140 mmHg. Conclusion: Clinical practice should focus less on pretreatment BP levels, which rarely predict future untreated BP levels or rule out capacity to benefit from BP lowering in high cardiovascular risk patients. Instead, focus should be on prompt, empirical treatment to maintain lower BP for those with high BP and/or high risk.

show abstract

“…means, standard deviations [SD], and sample sizes) of parasitoid for both ‘control” and ‘treatment’. Fundamental statistical values were extracted from studies in which the data were presented solely graphical using Web Plot Digitizer software …”

Section: Methodsmentioning

confidence: 99%

“…Fundamental statistical values were extracted from studies in which the data were presented solely graphical using Web Plot Digitizer software. 35…”

Section: Literature Search and Compilation Of Datasetmentioning

confidence: 99%

Relevance of the ecological traits of parasitoid wasps and nectariferous plants for conservation biological control: a hybrid meta‐analysis

Zhu

Zheng

Xie

et al. 2020

Pest Management Science

View full text Add to dashboard Cite

BACKGROUND Ecosystem services are key to human survival. In agriculture, they offer potential to intensify production while reducing reliance on hazardous inputs, including pesticides. Nectar plants can nourish natural enemies of pests and thereby promote the ecosystem service of biological control. To date, however, the selection of optimal plants has been reliant on laborious testing of multiple candidate species for use in each new agroecosystem. We report a hybrid meta‐analysis of published literature, employing Bayesian network analysis. RESULTS The hybrid meta‐analysis identified the particular plant and parasitoid traits that were most predictive of promoted or suppressed parasitoid longevity. Integrating trait effects identified a combination of plant‐parasitoid traits that had the highest impact on parasitoid longevity: compound umbel or raceme inflorescence form and shallow corolla, together with high potential fecundity of the parasitoid. CONCLUSION Unlike earlier analyses focusing on taxonomic categories, we analyzed effect sizes in relation to the ecological traits of parasitoids and plants. This generated the first generalizable guidelines for selecting nectar plants as well as appropriate parasitoid targets for the enhancement of biological control. Within the guidelines, optimal outcomes resulted when plants with compound umbel or raceme inflorescences and shallow corollas were combined with fecund parasitoids. More widely, this type of ecological trait‐based meta‐analysis opens a new avenue for optimizing the delivery of other types of ecosystem services. © 2019 Society of Chemical Industry

show abstract

Estimating data from figures with a Web‐based program: Considerations for a systematic review

Abstract: Systematic reviewers should consider and be transparent when estimating data from figures when the information cannot be obtained from study authors and perform sensitivity analyses of pooled results to reduce bias.

Cited by 193 publications

References 16 publications

Decline in soil moisture due to vegetation restoration on the Loess Plateau of China

Decline in soil moisture due to vegetation restoration on the Loess Plateau of China

Effects of blood pressure lowering on cardiovascular events, in the context of regression to the mean

Relevance of the ecological traits of parasitoid wasps and nectariferous plants for conservation biological control: a hybrid meta‐analysis

Contact Info

Product

Resources

About