TY - JOUR
T1 - Phase Relationship between DLMO and Sleep Onset and the Risk of Metabolic Disease among Normal Weight and Overweight/Obese Adults
AU - Baron, Kelly Glazer
AU - Reid, Kathryn J.
AU - Wolfe, Lisa F.
AU - Attarian, Hrayr
AU - Zee, Phyllis C.
N1 - Funding Information:
We thank David Clough, Tiffany Kim, Lori Koch, and Leland Bardsley for their assistance with data collection and Dr. Kumar Rajan for statistical consultation. We also thank Dr. William Schwartz for his helpful comments throughout the editing process of this manuscript. Support for this study was provided through the following grants: K23HL109110, UL1TR000150, P01 AG11412, R01 HL090873.
Publisher Copyright:
© 2017, © 2017 The Author(s).
PY - 2018/2/1
Y1 - 2018/2/1
N2 - Circadian misalignment is hypothesized to contribute to increased diabetes and obesity among shift workers and individuals with late sleep timing. Accordingly, the goal of our study was to identify—among normal and overweight/obese adults—associations between circadian timing (dim light melatonin onset; DLMO) and circadian misalignment (the interval between DLMO and sleep onset) with metabolic disease risk. This was a secondary analysis of data from a larger study. Participants ages 18 to 50 years without depression, diabetes, or shift work, with sleep duration 6.5 h or more, completed the following evaluations: 7 days of wrist actigraphy, circadian timing assessment (DLMO), and a fasting blood draw to measure glucose and insulin and calculate the Homeostatic Model of Assessment–Insulin Resistance (HOMA-IR). Data were analyzed using correlation and regression analyses controlling for age, sex, DLMO, and sleep duration. Analyses were conducted for the entire sample (n = 54) and stratified by normal weight (n = 36) and overweight/obese groups (n = 18). Mean age was 26.4 years (SD = 7.1 years). Average sleep duration was 436.2 min (SD = 55.1 min), DLMO was 2250h (SD = 01:31), and interval between DLMO and sleep onset was 2 h 18 min (SD = 53 min). Average BMI was 24.3 kg/m2 (SD = 4.5 kg/m2). Circadian timing and interval between DLMO and sleep onset were not associated with glucose, insulin, or HOMA-IR in the main analyses. Among overweight/obese participants, a shorter interval between DLMO and sleep onset was associated with higher insulin (B[SE] = −5.12 [2.24], p = 0.04) and HOMA-IR (B[SE] = −1.32 [0.57], p = 0.04). Results of our multivariable model indicated that among overweight/obese participants, insulin was 5.1 pmol/L higher and HOMA was 1.3 µU/mL higher for every hour closer that sleep onset was to DLMO. The strengths of this study include the use of objective measures of circadian timing, but results should be considered hypothesis generating due to the small sample size and use of subgroup analyses.
AB - Circadian misalignment is hypothesized to contribute to increased diabetes and obesity among shift workers and individuals with late sleep timing. Accordingly, the goal of our study was to identify—among normal and overweight/obese adults—associations between circadian timing (dim light melatonin onset; DLMO) and circadian misalignment (the interval between DLMO and sleep onset) with metabolic disease risk. This was a secondary analysis of data from a larger study. Participants ages 18 to 50 years without depression, diabetes, or shift work, with sleep duration 6.5 h or more, completed the following evaluations: 7 days of wrist actigraphy, circadian timing assessment (DLMO), and a fasting blood draw to measure glucose and insulin and calculate the Homeostatic Model of Assessment–Insulin Resistance (HOMA-IR). Data were analyzed using correlation and regression analyses controlling for age, sex, DLMO, and sleep duration. Analyses were conducted for the entire sample (n = 54) and stratified by normal weight (n = 36) and overweight/obese groups (n = 18). Mean age was 26.4 years (SD = 7.1 years). Average sleep duration was 436.2 min (SD = 55.1 min), DLMO was 2250h (SD = 01:31), and interval between DLMO and sleep onset was 2 h 18 min (SD = 53 min). Average BMI was 24.3 kg/m2 (SD = 4.5 kg/m2). Circadian timing and interval between DLMO and sleep onset were not associated with glucose, insulin, or HOMA-IR in the main analyses. Among overweight/obese participants, a shorter interval between DLMO and sleep onset was associated with higher insulin (B[SE] = −5.12 [2.24], p = 0.04) and HOMA-IR (B[SE] = −1.32 [0.57], p = 0.04). Results of our multivariable model indicated that among overweight/obese participants, insulin was 5.1 pmol/L higher and HOMA was 1.3 µU/mL higher for every hour closer that sleep onset was to DLMO. The strengths of this study include the use of objective measures of circadian timing, but results should be considered hypothesis generating due to the small sample size and use of subgroup analyses.
KW - HOMA
KW - circadian misalignment
KW - insulin
KW - melatonin
KW - sleep
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U2 - 10.1177/0748730417745914
DO - 10.1177/0748730417745914
M3 - Article
C2 - 29262758
AN - SCOPUS:85042113101
SN - 0748-7304
VL - 33
SP - 76
EP - 83
JO - Journal of biological rhythms
JF - Journal of biological rhythms
IS - 1
ER -
