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. Author manuscript; available in PMC: 2011 May 1.
Published in final edited form as: J Am Geriatr Soc. 2010 Apr 6;58(5):925–930. doi: 10.1111/j.1532-5415.2010.02803.x

Table 2.

Multilevel Model Predicting Daily Pain.

Fixed Effects
Predictor Variable B (SE) t (df)
Within-person
            Time -0.09 (0.04) -2.14 (30.15)*
            TWTcentered -0.0002 (0.03) -0.006 (428.88)
            TSTcentered -0.10 (0.05) -2.12 (29.44)*
Between-person
            Age -0.13 (13) -1.01 (40.79)
            Gender 0.08 (0.14) 0.57 (39.74)
            Medication 0.02 (0.14) 0.16 (39.26)
            TWTmean 0.23 (0.21) 1.09 (38.72)
            TSTmean -0.05 (0.18) -0.26 (39.68)
Random Effects
Covariance parameter estimate Variance (SE) Z
 
            Time 0.03 (0.02) 1.77
            TWTcentered 0.000a 0.000a
            TSTcentered 0.03 (0.02) 1.56
 
Within Pseudo R2 0.24
Between Pseudo R2 0.08

Notes:

*

p < 0.05

** p <0.01.

a

Variance too small to be estimated- The final Hessian matrix was not positive definite although all convergence criteria were satisfied.