Table 3 The results of Tobit regression and generalized linear models analyses on utility index and VAS score

Sleep quality

 Poor

− 0.151 (− 0.161, − 0.142)

− 7.59 (− 8.07, − 7.12)

− 0.130 (− 0.139, − 0.120)

− 6.69 (− 7.16, − 6.23)

− 0.124 (− 0.133, − 0.114)

− 6.25 (− 6.71, − 5.78)

 Good

Ref

Ref

Ref

Ref

Ref

Ref

Night sleep duration

 < 6 h

− 0.053 (− 0.070, − 0.036)

− 2.35 (− 3.17, − 1.54)

− 0.045 (− 0.062, − 0.028)

− 2.14 (− 2.94, − 1.35)

− 0.043 (− 0.059, − 0.026)

− 2.00 (− 2.78, − 1.21)

 6  h-

− 0.020 (− 0.032, − 0.008)

− 0.50 (− 1.06, 0.06)

− 0.020 (− 0.031, − 0.008)

− 0.56 (− 1.11, − 0.02)

− 0.020 (− 0.032, − 0.009)

− 0.58 (− 1.11, − 0.04)

 7 h-

Ref

Ref

Ref

Ref

Ref

Ref

 8 h-

− 0.019 (− 0.030, − 0.008)

− 0.29 (− 0.80, 0.21)

− 0.007 (− 0.017, 0.004)

0.19 (− 0.30, 0.68)

− 0.005 (− 0.016, 0.009)

0.26 (− 0.22, 0.75)

 9 h-

− 0.052 (− 0.068, − 0.037)

− 1.13 (− 1.85, − 0.41)

− 0.026 (− 0.041, − 0.011)

0.04 (− 0.67, 0.74)

− 0.023 (− 0.038, − 0.009)

0.15 (− 0.54, 0.84)

 ≥10 h

− 0.125 (− 0.149, − 0.101)

− 5.19 (− 6.38, − 4.01)

− 0.076 (− 0.099, − 0.053)

− 2.87 (− 4.03, − 1.71)

− 0.071 (− 0.095, − 0.049)

− 2.52 (− 3.66, − 1.39)