Table 1.

Ages for All Male and Female Researchers: NIDCR and NIH.

	Female	Male
NIDCRa
Researchers, n	536	1,401
Minimum	27	27
Maximum	72	73
Mean	41.0	40.1
95% CI	40.4 to 41.5	40.0 to 40.5
Median	40.0	39.0
SD	6.7	6.6
25% to 75%	36.0 to 45.0	35.0 to 44.0
Normal distribution, P value	<0.001	<0.001
NIHb
Researchers, n	274	673
Minimum	27	27
Maximum	62	73
Mean	41.6	40.3
95% CI	40.8 to 42.3	39.8 to 40.8
Median	41.0	39.0
SD	6.7	6.7
25% to 75%	37 to 46	35 to 44
Normal distribution, P value	<0.001	0.010

Age at the time of first R01 award for male and female researchers: NIDCR awardees from all organizations and NIH awardees from dental schools.

NIDCR, National Institute of Dental and Craniofacial Research; NIH, National Institutes of Health.

^aEquality of variances, P = 0.577. Male-female age difference, P = 0.014.

^bEquality of variances, P = 0.481. Male-female age difference, P = 0.010.