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Table 1 Comparison of ontology statistics between 2012 and 2013

From: The clinical measurement, measurement method and experimental condition ontologies: expansion, improvements and new applications

 

Clinical measurement

Measurement method

Experimental condition

 

2012

2013

2012

2013

2012

2013

Total # terms

523

1691

195

402

110

346

Defined terms

328

1427

116

326

76

320

Percent defined

62%

84%

59%

81%

69%

92%

Maximum depth

7

11

6

8

5

8

% terms with 2 or more parents

2.0%

15.8%

<1%

7.2%

1.0%

14.2%

% terms with single subclass

10.3%

15.6%

7.7%

14.9%

10.9%

17.1%

Average branching factor

0.98

0.86

1.00

0.93

0.99

0.87

  1. Table 1 displays the total number of terms for each ontology as well as the number and percentage of those terms with textual definitions, at the time of the original publication in May 2012 and as of July/August 2013. In addition, basic statistics such as the maximum depth of each ontology and information about the degree of branching for each are included.