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. 2020 Mar 19;8(3):e14538. doi: 10.2196/14538

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


≥10-minute bout ≥20-minute bout ≥30-minute bout ≥60-minute bout


Ba SE Betab P B SE Beta P B SE Beta P B SE Beta P
Physical function















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

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















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

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















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

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















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

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















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

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















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

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















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

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















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

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














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

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















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

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.