Base Base, Processes Base, Processes, Quality
Predictors Odds Ratios p Odds Ratios p Odds Ratios p
Intercept 0.69 0.491 21.31 <0.001 60.25 <0.001
SLOC 1.21 <0.001 0.93 0.129 0.98 0.759
Directories 1.27 <0.001 1.22 0.002 1.15 0.045
Top Level Directories 0.67 <0.001 0.63 <0.001 0.65 <0.001
Incubation Month 0.53 <0.001 0.73 <0.001 0.70 <0.001
Major Contributors 2.15 <0.001 2.21 <0.001
Minor Contributors 1.09 <0.001 1.09 <0.001
New Contributors 0.98 0.269 0.98 0.264
Files Added 1.00 0.764 1.01 0.675
Files Deleted 0.96 0.001 0.96 0.003
Avg. Files Modified per Commit 0.93 0.001 0.92 <0.001
Active Days 1.35 0.015 1.30 0.036
Emails 0.97 0.078 0.98 0.179
Corrective 1.06 0.001 1.05 0.005
Features 1.06 <0.001 1.06 <0.001
Perfective 1.00 0.969 1.00 0.903
Non Functional 1.03 0.138 1.03 0.159
Test/Main Lines of Code Percentage 1.04 0.079
#Functions /w McCabe Index 11-25 1.01 0.772
#Functions /w McCabe Index >51 1.01 0.446
Very Large File Size Count 0.90 <0.001
Very Large Function Size Count 1.19 <0.001
Code Duplication Percentage 0.87 0.004
Most Complex Function LOC 0.73 <0.001
Random Effects
σ2 3.29 3.29 3.29
τ00 3.16 programming_lang 5.05 programming_lang 14.50 programming_lang
ICC 0.49 0.61 0.82
N 20 programming_lang 20 programming_lang 20 programming_lang
Observations 4970 4970 4970
Marginal R2 / Conditional R2 0.097 / 0.539 0.213 / 0.689 0.154 / 0.844