Table 3.

Overview of all articles containing visualization techniques for comparison.

Author	Visualization technique supporting comparisons	Type of comparison	Visual comparison by Gleicher et al [23]
Kamaleswaran et al [40]a	Distribution: barcode plot Change over time: line Distribution: histogram	s-sb, s-mc, and s-cd	s-s: superposition+juxtaposition s-m: superposition+juxtaposition s-c: superposition+juxtaposition
Gomov et al [39]a	Change over time: calendar heat map	s-s, s-m, and s-c	s-s: juxtaposition s-m: juxtaposition s-c: juxtaposition+explicit encoding
Atherton et al [45]a	Change over time: Priestley timeline	s-s and s-m	s-s: juxtaposition s-m: juxtaposition
Gschwandtner et al [18]a	Correlation: scatterplot Change over time: columns Change over time: candlestick	s-s and s-m	s-m: juxtaposition+explicit encoding s-s: juxtaposition+explicit encoding
Tao et al [46]a	Change over time: Priestley timeline Flow: Sankey	s-s and s-m	s-s: juxtaposition s-m: juxtaposition
Guo et al [43]a	Change over time: columns Part to whole: tree maps	s-s and s-m	s-s: juxtaposition s-m: juxtaposition
Browne et al [48]	Change over time: columns Change over time: connected scatterplot	s-s	s-s: juxtaposition
Wildfire et al [34]a	Change over time: line	s-m	s-m: superposition
Wang et al [16]a	Change over time: Priestley timeline Distribution: histogram Part to whole: stacked column or bar	s-c, s-m, m-me, s-s, and c-cf	s-c: juxtaposition s-m: juxtaposition+explicit encoding (additive)
Klimov and Shahar [15]a	Change over time: line	s-c and s-m	s-c: superposition s-m: superposition
Stubbs et al [35]a	Change over time: line	s-c and s-m	s-c: superposition s-m: superposition
Gotz and Wongsuphasawat [41]a	Flow: Sankey	s-c, c-c, c-mg	c-c: superposition
Borhani et al [38]a	Correlation: scatterplot	s-c	s-c: superposition
van Dortmont et al [33]a	—h	s-c	s-c: superposition+explicit encoding
Gotz and Stavropoulos [42]a	Correlation: bubble	c-c, s-m	c-c: superposition+explicit encoding (animation)
Dabek et al [49]a	Flow: network	c-c and s-c	c-c: juxtaposition s-c: juxtaposition
Dahlin et al [51]a	Change over time: connected scatterplot	c-c and s-c	c-c: superposition s-c: superposition
Cho et al [47]	Deviation: Surplus or deficit filled line Change over time: columns Change over time: line	c-c and m-m	c-c: juxtaposition+explicit encoding (additive)
Rogers et al [36]a	Change over time: line Change over Time: fan chart Change over time: Priestley timeline	c-c and s-c	c-c: juxtaposition+explicit encoding, superposition+explicit encoding s-c: juxtaposition
Nickerson et al [50]	Correlation: XY heat map	c-c	c-c: juxtaposition
Polack et al [37]	Change over time: Priestley timeline	c-c	c-c: superposition+explicit encoding (additive)
Magallanes et al [44]	Distribution: box plot Correlation: scatterplot	c-c	c-c: superposition

^aContain a comparison of single patients to cohorts or to multiple other patients, as visualized in Figure 2.

^bs-s: single-to-single.

^cs-m: single-to-multiple.

^ds-c: single-to-cohort.

^em-m: multiple-to-multiple.

^fc-c: cohort-to-cohort.

^gc-m: cohort-to-multiple.

^hNot available.