Table 1.

Demographics and baseline characteristics of the study population.

Gender
	n	%
Female	148	74
Male	52	26
Zygosity
	n	%
Monozygotic	110	55
Dizygotic	90	45
Age (years)
	Monozygotic	Dizygotic
Mean	45.95	46.96
SD	16.61	17.20
Minimum	19	19
Maximum	77	82
Comorbidities
	n	%
Thyroid gland	25	12.5
Lungs	26	13.0
Cardiovascular system	36	18.0
Kidney	12	6.0
Pancreas	4	2.0
Gastrointestinal tract	49	24.5
Spine	45	22.5
Mental	26	13.0