Table 4.
Association of the frequency of bouts of sedentary time (ST) of different lengths with 36-item Short-Form Health Survey (SF-36) dimensions (N=407).
| Dimensions and models | Frequency of bouts (number of bouts/sedentary hours) of different bout lengths | ||||||||||||||||
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≥10-minute bout | ≥20-minute bout | ≥30-minute bout | ≥60-minute bout | ||||||||||||
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Ba | SE | Betab | P | B | SE | Beta | P | B | SE | Beta | P | B | SE | Beta | P |
| Physical function |
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Model 1c | 2.386 | 4.237 | .028 | .57 | -10.754 | 5.882 | -.092 | .07 | -18.793 | 7.663 | -.123 | .02 | -61.611 | 16.061 | -.188 | <.001 |
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Model 2d | 3.728 | 4.240 | .044 | .38 | -7.970 | 6.002 | -.068 | .19 | -15.416 | 7.820 | -.101 | .049 | -56.713 | 16.208 | -.173 | .001 |
| Physical role |
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Model 1 | 3.602 | 4.575 | .038 | .43 | -4.921 | 6.375 | -.038 | .44 | -12.379 | 8.315 | -.072 | .14 | -35.905 | 17.572 | -.098 | .04 |
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Model 2 | 5.161 | 4.572 | .055 | .26 | -1.341 | 6.490 | -.010 | .84 | -8.033 | 8.469 | -.047 | .34 | -29.379 | 17.693 | -.080 | .10 |
| Bodily pain |
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Model 1 | -1.811 | 3.163 | -.028 | .57 | -6.140 | 4.399 | -.068 | .16 | -9.957 | 5.741 | -.084 | .08 | -31.088 | 12.109 | -.122 | .01 |
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Model 2 | -1.128 | 3.179 | -.017 | .72 | -4.636 | 4.500 | -.051 | .30 | -8.101 | 5.873 | -.068 | .17 | -28.355 | 12.245 | -.111 | .02 |
| General health |
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Model 1 | 1.978 | 3.370 | .029 | .56 | -2.700 | 4.696 | -.029 | .57 | -6.395 | 6.132 | -.052 | .30 | -14.374 | 12.987 | -.054 | .27 |
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Model 2 | 2.167 | 3.399 | .032 | .52 | -2.433 | 4.818 | -.026 | .61 | -6.189 | 6.289 | -.050 | .33 | -13.956 | 13.166 | -.053 | .29 |
| Vitality |
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Model 1 | -4.226 | 3.928 | -.053 | .28 | -13.300 | 5.441 | -.122 | .02 | -19.025 | 7.101 | -.133 | .01 | -44.261 | 15.015 | -.145 | .003 |
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Model 2 | -2.976 | 3.931 | -.038 | .45 | -10.617 | 5.549 | -.097 | .06 | -15.624 | 7.240 | -.109 | .03 | -38.871 | 15.125 | -.127 | .01 |
| Social functioning |
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Model 1 | -2.477 | 5.242 | -.022 | .64 | -19.997 | 7.237 | -.132 | .01 | -30.153 | 9.429 | -.151 | .001 | -73.977 | 19.887 | -.173 | <.001 |
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Model 2 | 0.493 | 5.150 | .004 | .92 | -13.339 | 7.267 | -.088 | .07 | -21.717 | 9.472 | -.109 | .02 | -60.962 | 19.730 | -.143 | .002 |
| Emotional role |
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Model 1 | 4.353 | 5.913 | .035 | .46 | 1.973 | 8.246 | .011 | .81 | -2.809 | 10.777 | -.012 | .79 | -4.716 | 22.830 | -.010 | .84 |
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Model 2 | 5.130 | 5.958 | .041 | .39 | 3.877 | 8.449 | .023 | .65 | -0.610 | 11.041 | -.003 | .96 | -1.328 | 23.120 | -.003 | .95 |
| Mental health |
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Model 1 | 5.702 | 4.196 | .065 | .18 | 0.485 | 5.861 | .004 | .93 | -2.013 | 7.659 | -.013 | .79 | -19.328 | 16.197 | -.057 | .23 |
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Model 2 | 6.372 | 4.225 | .072 | .13 | 1.989 | 6.003 | .016 | .74 | -0.195 | 7.844 | -.001 | .98 | -16.941 | 16.404 | -.050 | .30 |
| Physical component |
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Model 1 | -0.238 | 1.557 | -.008 | .88 | -4.104 | 2.160 | -.097 | .06 | -6.827 | 2.816 | -.122 | .02 | -19.387 | 5.930 | -.162 | .001 |
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Model 2 | 0.186 | 1.562 | .006 | .91 | -3.222 | 2.208 | -.076 | .15 | -5.754 | 2.877 | -.103 | .046 | -17.763 | 5.989 | -.149 | .003 |
| Mental component |
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Model 1 | 1.309 | 2.431 | .025 | .59 | -1.825 | 3.387 | -.025 | .59 | -4.017 | 4.424 | -.043 | .36 | -11.036 | 9.365 | -.055 | .24 |
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Model 2 | 1.910 | 2.440 | .037 | .43 | -0.438 | 3.461 | -.006 | .90 | -2.300 | 4.520 | -.024 | .61 | -8.442 | 9.459 | -.042 | .37 |
aB: nonstandardized regression coefficient. Linear regression models built using Enter method, with SF-36 domains as dependent variables and percentage of ST in different bout lengths as independent variables.
bBeta: standardized regression coefficient.
cModel 1: adjusted for age, fat percentage, occupational status, medication for pain, medication for depression, accelerometer wear time, and ST.
dModel 2: analysis controlled for model 1 + moderate-to-vigorous PA.