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Table 4 Hierarchical Multiple Logistic Regression Analyses of Purpose in Life and Possible Presence of RLS

From: Is purpose in life associated with less sleep disturbance in older adults?

   β SE p Odds ratio 95% CI Χ 2 Nagelkerke R 2
Possible presence of RLS at Baseline (n = 814) Step 1       8.189(4) .015
 Sex −.315 .208 .131 .730 .485–1.098   
 Years of Education −.043 .028 .129 .958 .906–1.013   
 Age .019 .012 .109 1.019 .996–1.043   
 Race .043 .179 .808 1.044 .735–1.483   
Step 2       11.758 (5) * .022
 Sex −.307 .209 .141 .736 .489–1.108   
 Education −.032 .029 .263 .968 .915–1.025   
 Age .014 .012 .263 1.014 .990–1.038   
 Race .050 .180 .782 1.051 .739–1.494   
 Purpose in Life −.355 .188 .059 .701 .485–1.013   
Possible presence of RLS at 1-Year Follow-Up (n = 814) Step 1       3.105(4) .006
 Sex −.087 .203 .667 .916 .616–1.364   
 Years of Education −.045 .028 .111 .956 .904–1.010   
 Age −.002 .012 .884 .998 .975–1.021   
 Race −.117 .179 .514 .890 .626–1.264   
Step 2       14.688 (5) ** .027
 Sex −.073 .204 .722 .930 .623–1.388   
 Years of Education −.026 .029 .367 .974 .920–1.031   
 Age −.012 .012 .326 .988 .964–1.012   
 Race −.109 .181 .547 .897 .629–1.279   
Purpose in Life −.646 .191 .001 .524 .361–.762   
Possible presence of RLS at
2-Year Follow-Up (n = 550)
Step 1       2.218(4) .006
 Sex −.196 .237 .407 .822 .517–1.307   
 Years of Education −.026 .033 .422 .974 .913–1.039   
 Age −.004 .015 .808 .996 .967–1.026   
 Race −.204 .211 .334 .816 .539–1.234   
Step 2       17.106 (5) ** .045
 Sex −.148 .240 .538 .862 .539–1.380   
 Years of Education .001 .034 .979 1.001 .937–1.069   
 Age −.015 .016 .319 .985 .955–1.015   
 Race −.184 .214 .390 .832 .546–1.266   
Purpose in Life −.927 .244 .000 .396 .245–.639   
Possible presence of RLS at
3-Year Follow-Up (n = 245)
Step 1       4.132(4) .027
 Sex −.696 .425 .102 .499 .217–1.148   
 Years of Education .005 .058 .938 1.005 .897–1.125   
 Age .012 .026 .641 1.012 .963–1.064   
 Race −.348 .355 .327 .706 .352–1.417   
Step 2       4.138 (5) .027
 Sex −.694 .426 .103 .500 .217–1.151   
 Years of Education .006 .061 .922 1.006 .893–1.133   
 Age .011 .027 .675 1.011 .959–1.066   
 Race −.350 .357 .326 .705 .350−1.417   
 Purpose in Life –.030 .381 .936 .970 .460–2046   
  1. Four separate regression analyses. * = p ≤ .05, ** = p ≤ .01, bolding is used to emphasize significant predictors within the models, RLS Restless Leg Syndrome