Table 6 The likelihood for Sleep abnormalities according to tetiles of insulin index and insulin load in BMI < 25

Short sleep duration (< 5 h vs. 5–8 h)

 Crude

1

0.93 (0.64–1.35)

1.03 (0.72–1.47)

0.85

1

0.76 (0.53–1.09)

0.92 (0.64–1.31)

0.63

 Model 1 ²

1

0.92 (0.63–1.34)

1.01 (0.70–1.45)

0.95

1

0.88 (0.58–1.34)

1.37 (0.69–2.74)

0.64

 Model 2 ³

1

0.95 (0.64–1.42)

1.02 (0.69–1.50)

0.92

1

0.87 (0.56–1.35)

1.35 (0.65–2.79)

0.70

 Model 3 ⁴

1

0.95 (0.64–1.41)

0.98 (0.66–1.46)

0.94

1

0.89 (0.57–1.39)

1.39(0.66–2.88)

0.63

Long sleep duration (> 8 h vs. 5–8 h)

 Crude

1

1.11 (0.80–1.55)

0.94 (0.67–1.32)

0.73

1

1.01 (0.72–1.42)

1.18 (0.84–1.65)

0.33

 Model 1

1

1.11 (0.79–1.56)

0.98 (0.69–1.39)

0.93

1

0.86 (0.58–1.26)

0.85 (0.45–1.62)

0.54

 Model 2

1

1.24 (0.87–1.79)

1.00 (0.68–1.46)

0.99

1

0.83 (0.55–1.26)

0.99 (0.50–1.96)

0.78

 Model 3

1

1.24 (0.87–1.79)

1.00 (0.68–1.45)

0.99

1

0.83 (0.55–1.26)

1.00 (0.51–1.99)

0.80

Low sleep quality

 Crude

1

1.49 (0.66–3.38)

1.67 (0.75–3.70)

0.21

1

0.98 (0.41–2.34)

1.90 (0.88–4.13)

0.08

 Model 1

1

1.76 (0.47–4.18)

2.16 (0.93–5.02)

0.07

1

1.04 (0.40–2.72)

1.22 (0.29–5.09)

0.80

 Model 2

1

1.82 (0.73–4.53)

2.05 (0.83–5.04)

0.12

1

0.84 (0.29–2.42)

0.91 (0.19–4.32)

0.87

 Model 3

1

1.61 (0.47–5.51)

1.92 (0.57–6.45)

0.29

1

2.01 (0.48–8.32)

1.48 (0.18–12.15)

0.61

Insufficient sleep

 Crude

1

0.92 (0.64–1.33)

1.04 (0.73–1.48)

0.82

1

0.76 (0.53–1.09)

0.90 (0.63–1.29)

0.56

 Model 1

1

0.91 (0.63–1.32)

1.00 (0.70–1.44)

0.97

1

0.89 (0.59–1.35)

1.38 (0.69–2.73)

0.61

 Model 2

1

0.92 (0.62–1.36)

1.01 (0.69–1.49)

0.94

1

0.88 (0.56–1.36)

1.31 (0.63–2.67)

0.72

 Model 3

1

0.91 (0.61–1.35)

0.98 (0.66–1.44)

0.92

1

0.90 (0.58–1.40)

1.34 (0.65–2.77)

0.65

Delay in falling asleep

 Crude

1

0.93 (0.66–1.32)

1.00 (0.71–1.41)

0.99

1

0.84 (0.59–1.21)

1.22 (0.86–1.71)

0.23

 Model 1

1

0.97 (0.67–1.38)

1.06 (0.75–1.51)

0.73

1

0.85 (0.57–1.27)

1.13 (0.59–2.15)

0.94

 Model 2

1

0.98 (0.67–1.44)

1.05 (0.72–1.54)

0.78

1

0.79 (0.51–1.22)

1.09 (0.54–2.18)

0.93

 Model 3

1

0.98 (0.67–1.44)

1.02 (0.69–1.50)

0.92

1

0.81 (0.52–1.26)

1.05 (0.52–2.12)

0.88

Had to use medication for sleep

 Crude

1

1.35 (0.77–2.39)

1.31 (0.74–2.31)

0.35

1

0.74 (0.42–1.28)

0.85 (0.49–1.47)

0.56

 Model 1

1

1.37 (0.76–2.47)

1.36 (0.75–2.46)

0.32

1

0.83 (0.44–1.58)

0.75 (0.25–2.24)

0.56

 Model 2

1

1.53 (0.78–2.99)

1.55 (0.80–3.00)

0.20

1

0.64 (0.31–1.33)

0.74 (0.22–2.49)

0.43

Sleep disorders

 Crude

1

0.57 (0.28–1.16)

0.94 (0.51–1.74)

0.82

1

1.02 (0.50–2.06)

1.47 (0.75–2.85)

0.24

 Model 1

1

0.62 (0.30–1.28)

0.56 (0.35–0.91)

0.85

1

0.95 (0.43–2.08)

0.93 (0.27–3.21)

0.90

 Model 2

1

0.71 (0.33–1.53)

1.20 (0.59–2.43)

0.63

1

0.94 (0.40–2.22)

0.68 (0.17–2.70)

0.62

 Model 3

1

0.66 (0.30–1.43)

1.08 (0.53–2.21)

0.83

1

1.01 (0.42–2.39)

0.69 (0.17–2.75)

0.66