Table 4.

Odds ratios (ORs) and 95% confidence intervals (CIs) for insomnia based on tertiles of glycemic index and glycemic load

	Tertiles of Glycemic Indices			P for trend
	T1	T2	T3
Glycemic index
Median score	154	213	299
Insomnia /control	37 / 111	29 / 119	45 / 103
Crude model	1.00 (Ref)	0.71 (0.41 – 1.23)	1.10 (0.66—1.84)	0.676
Model 1a	1.00 (Ref)	0.69 (0.39—1.20)	1.10 (0.65—1.86)	0.704
Model 2b	1.00 (Ref)	0.66 (0.37—1.17)	1.12 (0.66—1.91)	0.647
Model 3c	1.00 (Ref)	0.77 (0.42—1.41)	1.38 (0.77—2.47)	0.298
Glycemic load
Median score	54.2	62.8	71.6
Insomnia /control	39 / 109	30 / 118	42 / 106
Crude model	1.00 (Ref)	0.73 (0.42—1.26)	1.32 (0.79—2.20)	0.195
Model 1a	1.00 (Ref)	0.72 (0.41—1.26)	1.34 (0.78—2.30)	0.209
Model 2b	1.00 (Ref)	0.93 (0.49—1.76)	2.65 (1.14—6.20)	0.014
Model 3c	1.00 (Ref)	0.81 (0.41—1.59)	2.72 (1.10—6.70)	0.017

^aAdjusted for age and sex

^bAdjusted for model 1 and physical activity, smoking, overweight and obesity (yes, no), and dietary intake of energy

^cAdjusted for model 2, socio-economic status, and GHQ score