. Author manuscript; available in PMC: 2017 Oct 1.

Published in final edited form as: J Biol Rhythms. 2016 Jul 22;31(5):461–469. doi: 10.1177/0748730416656948

Table 3.

Association between baseline characteristics and lifestyle factors with presence of pineal cysts or calcification among 122 men in AGES-Reykjavik cohort.

Category	Mean ± SD or No. (%)	Presence of cysts		Presence of calcification
Category	Mean ± SD or No. (%)	Beta	p-value	Beta	p-value
Age (yrs)	75 ± 5.2	−0.09	0.02	−0.02	0.71
Body Mass Index (kg/m2)	27 ± 3.7	0.02	0.74	−0.03	0.63
Very severe sleep problem (yes/no)	11 (9)	−0.99	0.14	0.02	0.98
6-Sulfatoxymelatonin, ng/mL	21 ± 16	0.02^*	0.21	0.01^*	0.46
Beta-blocker medication (yes/no)	41 (34)	0.28	0.48	−0.48	0.29
Currently smoking	19 (16)	1.11	0.06	0.95	0.08
Alcohol (g/week)	26 (53)	0.001	0.82	0.00	0.91

Adjusted for urinary creatinine level.