Duke University Median Registered Time to Degree to Ph.D. for Students Entering in 1998-2003 (Years)
	Duke	US median in 2006
HUMANITIES	6.3	9.7
Art History	8.2	n/a
Classical Studies	5.7	n/a
English	6.0	8.9
German Studies	6.3	n/a
Literature	6.7	8.9
Music	6.0	n/a
Philosophy	5.7	n/a
Religion	5.7	n/a
Romance Studies	7.5	9.7
SOCIAL SCIENCES	5.7	7.9
Business	5.3	9.2
Cultural Anthropology	6.7	9.7
Economics	4.7	7.2
History	6.7	9.7
Political Science	6.3	9.1
Psychology	5.3	7.0
Sociology	5.7	9.7
PHYSICAL SCIENCES	5.7	6.7
Chemistry	5.1	5.9
Computer Science	6.0	7.7
Earth and Ocean Sciences(includes Geology)	5.0	7.7
Environment	5.3	7.7
Mathematics	4.8	6.7
Physics	5.8	6.8
Statistical Science	4.7	n/a
ENGINEERING	5.0	6.9
Biomedical Engineering	5.7	n/a
Civil and Environmental Engineering	4.8	n/a
Electrical and Computer Engineering	4.7	n/a
Mechanical Engineering and Materials Science	4.3	n/a
BIOLOGICAL SCIENCES	5.7	7.0
Biochemistry	5.7	6.3
Bioinformatics and Genome Technology	0.0	n/a
Biological Anthropology and Anatomy	6.3	9.7
Biology (includes Botany,Zoology)	5.7	n/a
Cell Biology	5.5	n/a
Ecology	5.7	n/a
Genetics and Genomics	5.7	n/a
Immunology	5.3	n/a
Molecular Cancer Biology	5.7	n/a
Molecular Genetics and Microbiology(Genetics Departments,Microbiology)	5.3	n/a
Neurobiology	6.0	n/a
Pathology	4.6	n/a
Pharmacology	5.7	n/a
Five-year cohort data posted: October, 2009