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. 2011 Jan 24;127(2):e345–e352. doi: 10.1542/peds.2010-0497

TABLE 3.

Correlations Between Mean Weekly Sleep Duration and Metabolic Marker Levels for 9 Sleep Pattern Subgroups

Subgroup Correlation With TSTs
Glucose Level Insulin Level Triglyceride Level Cholesterol Level HDL Level LDL Level CRP Level
1 SD
    SS 0.08 −0.43 −0.19 −0.26 0.25 −0.44 −0.63a
    SN 0.33 0.12 −0.18 −0.60a −0.06 −0.61a 0.25
    SL — — 0.96 0.97 0.41 0.87 —
    NS −0.33 −0.44 −0.36 −0.03 −0.03 0.08 −0.43
    NN 0.38b −0.05 −0.003 −0.06 −0.02 −0.06 −0.02
    NL 0.09 0.31 −0.48 0.05 0.22 0.09 0.17
    LS — — — — — — —
    LN 0.64 0.71a 0.23 −0.27 0.04 −0.40 0.82b
    LL 0.19 — 0.60 0.64 −0.11 −0.23 −0.05
1.5 SDs
    SS −0.14 −0.38 −0.03 0.07 0.29 −0.09 −0.48
    SN 0.12 −0.03 −0.24 −0.36 0.26 −0.44 0.50
    NS −0.03 −0.12 −0.73a −0.13 −0.34 0.30 −0.06
    NN 0.11 0.04 −0.05 0.09 −0.04 0.14 0.002
    NL 0.89 0.55 0.23 0.92a 0.62 0.81 0.03
    LN 0.76 0.96a 0.77 −0.30 −0.90 −0.52 0.99a
    LL 0.19 — 0.60 0.64 −0.11 −0.29 −0.05
2 SDs
    SN −0.41 −0.16 −0.16 −0.28 0.17 −0.31 0.61
    NS −0.04 −0.45 −0.18 0.61 0.77 0.59 −0.67
    NN 0.10 −0.04 0.005 0.15 0.07 0.15 −0.01
    NL — — — — — — —

SS indicates short sleep duration on schooldays and short sleep duration on weekend days (ie, consistently short sleepers); SN, short sleep duration on schooldays and normal sleep duration on weekend days (with normal being the standard of the community sample); SL, short sleep duration on schooldays and long sleep duration on weekend days; NS, normal sleep duration on schooldays and short sleep duration on weekend days; NN, normal sleep duration on schooldays and normal sleep duration on weekend days (ie, consistently normal sleepers); NL, normal sleep duration on schooldays and long sleep duration on weekend days; LS, long sleep duration on schooldays and short sleep duration on weekend days; LN, long sleep duration on schooldays and normal sleep duration on weekend days; LL, long sleep duration on schooldays and long sleep duration on weekend days (ie, consistently long sleepers). For illustration purposes, sleep duration for the SS group was ∼6.5 hours, that for the NN group was ∼8 hours, and that for the LL group was ∼9.5 hours (Supplemental Tables 8 and 9). — indicates insufficient cases.

a

Significant at P < .05.

b

Significant at P < .01.