Age, years | Lumbar BMD | Weight, kg | Exercise (yes) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dependent variable | Model R2 | R2 increment | β | r | R2 increment | β | r† | R2 increment | β | r† | R2 increment | β | r† |
Disc height | 0.154 | 0.130 | 0.386*** | 0.365*** | 0.030 | 0.196*** | 0.240*** | 0.005 | 0.075* | 0.132*** | 0.006 | 0.075* | 0.083* |
Disc signal | 0.303 | 0.262 | 0.549*** | 0.552*** | 0.004 | 0.072* | 0.164*** | 0.017 | 0.142*** | 0.193*** | 0.001 | 0.024 | 0.039 |
Disc bulge | 0.109 | 0.106 | 0.348*** | 0.337*** | 0.016 | 0.146*** | 0.155*** | 0.001 | 0.029 | 0.094** | 0.002 | 0.044 | 0.058 |
Anterior osteophytes | 0.111 | 0.101 | 0.341*** | 0.315*** | 0.012 | 0.127** | 0.158*** | 0.000 | 0.019 | 0.075* | 0.011 | 0.106** | 0.112** |
LDD summary score | 0.285 | 0.258 | 0.544*** | 0.519*** | 0.022 | 0.168*** | 0.247*** | 0.009 | 0.100** | 0.176*** | 0.006 | 0.075* | 0.101** |
Multiple p value | <0.0001 | <0.0001 | <0.0001 | <0.0001 |
R2 increment was calculated as squared semipartial correlation; this reflects the drop in R2 of the model if a particular predictor had been excluded from the model, with the rest of predictors remaining in the model.
Statistically significant terms (p<0.05, at least) are shown in bold, specifically:
↵* p value <0.05;
↵** p value <0.01;
↵*** p value <0.001.
R is the Pearson correlation between raw LDD traits and age;
↵r† is the Pearson correlation between the variables adjusted for age only.
BMD, body mineral density; LDD, lumbar degenerative disc disease.