Table 2 The hours of sleep duration in school closure and after reopening

 School lockdown

9.49(9.38,9.60)

9.18(9.06,9.30)

8.88(8.84,8.92)

 School reopen

8.61(8.51,8.72)

8.42(8.31,8.53)

7.77(7.72,7.81)

 Difference

−0.87(− 1.00, − 0.75) ^***

−0.76(− 0.89, − 0.64) ^***

−0.82(− 0.91, − 0.73) ^***

 School lockdown

9.36(9.23,9.50)

9.17(9.05,9.28)

9.26(9.18,9.35)

 School reopen

8.60(8.45,8.69)

8.21(8.11,8.32)

8.39(8.31,8.47)

 Difference

−0.79(− 0.92, − 0.67) ^***

−0.95(− 1.06, − 0.85) ^***

−0.87(− 0.95, − 0.79) ^***

 School lockdown

8.79(8.66,8.93)

8.71(8.58,8.84)

8.75(8.66,8.85)

 School reopen

7.90(7.77,8.04)

7.58(7.46,7.70)

7.76(7.66,7.85)

 Difference^#

−0.89(−1.02, − 0.76) ^***

−1.13(− 1.24, − 1.01) ^***

−1.00(− 1.09, − 0.91) ^***

 School lockdown

8.65(8.49,8.82)

8.83(8.67,8.99)

8.75(8.63,8.86)

 School reopen

7.85(7.66,8.03)

7.61(7.49,7.74)

7.72(7.61,7.83)

 Difference^#

−0.81(−1.00, − 0.61) ^***

−1.22(− 1.37, − 1.07) ^***

−1.02(1.15, 0.90-) ^***

 School lockdown

8.69(8.54,8.83)

8.71(8.57,8.86)

8.70(8.60,8.80)

 School reopen

7.31(7.14,7.47)

7.01(6.88,7.15)

7.17(7.06,7.28)

 Difference^#

−1.38(− 1.55, − 1.21) ^***

−1.70(− 1.85, − 1.55)

−1.53(− 1.64, − 1.42) ^***

 School lockdown

8.69(8.52,8.86)

8.53(8.37,8.68)

8.62(8.50,8.73)

 School reopen

7.64(7.47,7.82)

7.04(6.91,7.17)

7.37(7.26,7.48)

 Difference^###

−1.05(− 1.21, −0.88) ^***

− 1.49(− 1.62, 1.35) ^***

−1.25(− 1.36, − 1.13) ^***

 School lockdown

8.20(7.84,8.55)

8.16(7.87,8.46)

8.18(7.95,8.40)

 School reopen

7.07(6.63,7.51)

6.69(6.34,7.03)

6.85(6.58,7.12)

 Difference

−1.13(− 1.56, −0.69) ^***

− 1.48(− 1.76, − 1.19) ^***

−1.33(− 1.57, − 1.08) ^***

 School lockdown

8.93(8.87,8.99)

8.83(8.77,8.88)

8.88(8.84,8.92)

 School reopen

7.93(7.87,8.00)

7.59(7.53,7.65)

7.77(7.72,7.81)

 Difference^###

−1.00(−1.06, −0.94) ^***

− 1.23(− 1.29, − 1.18) ^***

−1.11(− 1.16, − 1.07) ^***