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. 2024 Sep 9;10:e51653. doi: 10.2196/51653

Table 4.

Comparison of loneliness between phases and between sociodemographic characteristics.

Sociodemographic indexes Phase 1 Phase 2 Phase 3 Interaction Group Phase

Values, mean (SD) Values, mean (SD) Values, mean (SD) F (df) P value ηp2 F (df) P value ηp2 F (df) P value ηp2
Sex 4.80 (1.98, 7705.74) .008 0.001 13.73 (1.00, 3890.00) <.001 0.004 22.71 (1.98, 7705.74) <.001 0.006

Male 23.98 (5.55) 24.19 (5.72) 24.22 (5.68)









Female 23.13 (5.96) 23.75 (6.14) 23.57 (6.23)








Age (y) 1.17 (5.94, 7702.10) .32 0.001 69.40 (3.00, 3888.00) <.001 0.051 12.57 (1.98, 7702.10) <.001 0.003

18-29 23.91 (5.73) 24.35 (5.60) 24.37 (5.78)









30-49 24.37 (5.76) 24.96 (5.91) 24.80 (5.82)









50-64 23.79 (5.61) 24.09 (5.80) 24.03 (5.96)









≥65 21.07 (5.38) 21.24 (5.49) 21.34 (5.58)








Occupation 0.49 (7.92, 7700.42) .87 0.000 12.54 (4.00, 3887.00) <.001 0.013 6.24 (1.98, 7700.42) .002 0.002

Employed 23.76 (5.51) 24.13 (5.70) 24.12 (5.69)









Homemaker 22.26 (6.24) 22.78 (6.42) 22.52 (6.41)









Student 23.70 (4.68) 24.24 (4.70) 24.33 (5.64)









Unemployed 23.81 (6.33) 24.15 (6.28) 23.99 (6.41)









Other 25.02 (5.97) 25.79 (6.41) 25.58 (6.53)








Marital status 0.55 (1.98, 7706.43) .58 0.000 286.11 (1.00, 3890.00) <.001 0.069 20.26 (1.98, 7706.43) <.001 0.005

Married 22.53 (5.41) 22.90 (5.55) 22.88 (5.57)









Unmarried 25.46 (5.88) 25.91 (6.07) 25.75 (6.16)








The presence of child 0.15 (1.98, 7706.66) .86 0.000 244.19 (1.00, 3890.00) <.001 0.059 21.54 (1.98, 7706.66) <.001 0.006

Yes 22.44 (5.41) 22.82 (5.65) 22.74 (5.62)









No 25.03 (5.86) 25.46 (5.93) 25.41 (6.03)








Annual household income (in million; JPYa) 0.72 (7.93, 5523.82) .68 0.001 29.91 (4.00, 2786.00) <.001 0.041 7.76 (1.98, 5523.82) <.001 0.003

<2.0 26.85 (6.38) 27.03 (6.29) 26.96 (6.60)









2.0-3.9 24.12 (5.92) 24.62 (6.11) 24.42 (6.04)









4.0-5.9 23.45 (5.67) 23.82 (5.77) 23.62 (5.74)









6.0-7.9 23.21 (5.49) 23.54 (5.88) 23.75 (5.88)









≥8.0 22.45 (5.58) 22.68 (5.65) 22.66 (5.81)








a1 JPY=US $0.0093.