Table 3.

Multivariable-adjusted odds ratios for the association between childhood high-frequency EEG activity during sleep and incident insomnia symptoms in adolescence

	SOL (n=36)	SO (n=35)	NREM (n=45)	REM (n=45)
Low-β	1.21 (0.57–2.27)	1.02 (0.46–2.28)	1.35 (0.69–2.62)	1.80 (0.56–4.28)
High-β	1.32 (0.62–2.78)	0.91 (0.42–2.01)	2.99 (1.12–7.98)*	1.83 (0.74–4.54)

Data are odds ratios (95% confidence intervals) adjusted for childhood age, apnea/hypopnea index and sex and indicate the odds of incident insomnia symptoms in adolescence associated with one standard deviation increase in childhood EEG relative power. SOL = sleep onset latency (time between lights off and sleep onset). SO = sleep onset (first 5 minutes of sleep). NREM = non-rapid eye movement sleep (stages 2 and slow wave sleep). REM = rapid eye movement sleep.

^*P < 0.05