TABLE 1.

Cohort Demographics and Data

	Number	Average Age (y)	PHR (2955 cm⁻¹/2919 cm⁻¹)	P
Cohort without dry eye
Total	45	22.3 ± 0.2	0.46 ± 0.01
Female	14	20.9 ± 0.5	0.43 ± 0.02
Male	31	23.3 ± 0.4	0.47 ± 0.02	0.2, vs. females
White	35	22.1 ± 0.3	0.46 ± 0.03
Asian	5	23 ± 1	0.47 ± 0.05	0.8, vs. whites
Black	4	30 ± 3	0.49 ± 0.04	0.7, vs. whites
Hispanic	1	29	0.49
Cohort with meibomian gland dysfunction
Total	42	65 ± 2	0.39 ± 0.01	0.0003, vs. without dry eye
Female	13	58.9 ± 0.9	0.38 ± 0.03
Male	29	63.8 ± 0.2	0.39 ± 0.02	0.8, vs. females
White	34	67.2 ± 0.2	0.39 ± 0.02
Black	4	56 ± 2	0.40 ± 0.06	0.7, vs. whites
Hispanic	1	50	0.34
Cohort that had hematopoietic stem cell transplantation
Total	19	23 ± 2	0.39 ± 0.01	0.0017, vs. without dry eye
Female	8	20.9 ± 0.5	0.43 ± 0.05
Male	11	23.3 ± 0.4	0.35 ± 0.02	0.09, vs. females
White	15	43.5 ± 0.6	0.39 ± 0.03
Asian	1	13	0.33
Black	3	42 ± 4	0.36 ± 0.09	0.7, vs. whites
Tear lipids from the cohort that had hematopoietic stem cell transplantation
Total	5 pools from 44 donors	23 ± 2	0.0387 ± 0.004	<0.001, vs. without dry eye

Average ± standard error of the mean. Data for meibum, except where indicated.