From: Analysis of longitudinal semicontinuous data using marginalized two-part model
Model component | Covariate | One-part modela,b: parameter estimate, (SE), P-value | TP model uncorrelated random effectsc: Parameter estimate, (SE), P-value | TP model correlated random effectsd: Parameter estimate, (SE), P-value | mTP modele: Parameter estimate, (SE), P-value |
---|---|---|---|---|---|
Zero part | Intercept | 1.4790, (1.0269), 0.1498 | 0.5006, (0.1246), < 0.0001 | − 0.8797, (0.1737), < 0.0001 | − 0.1172, (0.0896), 0.1917 |
Txt group | 0.1582, (0.0942), 0.0932 | − 0.2506, (0.1496), 0.0944 | − 0.6384, (0.2472), 0.0100 | − 0.2899, (0.0609), < 0.0001 | |
Smoking | − 0.2739, (0.2573), 0.2870 | 0.5177, (0.1944), 0.0080 | 0.5693, (0.2767), 0.0400 | 0.6705, (0.0864), < 0.0001 | |
Time | 0.0630, (0.0176), 0.0003 | 0.0355, (0.0190), 0.0626 | − 0.5005, (0.0725), < 0.0001 | − 0.0657, (0.0165), < 0.0001 | |
Continuous Non-zero part | Intercept | – | 2.5112, (0.3580), < 0.0001 | − 1.8443, (0.5939), 0.0020 | − 1.9699, (0.4325), < 0.0001 |
HbA1c | 0.0597, (0.0507), 0.2387 | − 0.0065, (0.0179), 0.7164 | 0.0970, (0.0244), < 0.0001 | 0.0755, (0.0214), 0.0005 | |
Age | − 0.0114, (0.0084), 0.1771 | − 0.0121, (0.0041), 0.0045 | − 0.0018, (0.0057), 0.7476 | − 0.0020, (0.0049), 0.6879 | |
Duration | − 0.0336, (0.0165), 0.0425 | − 0.0082, (0.0065), 0.2098 | 0.0035, (0.0092), 0.7007 | 0.0030, (0.0081), 0.7072 | |
SBP | 0.0103, (0.0073), 0.1614 | 0.0047, (0.0024), 0.0534 | 0.0267, (0.0043), < 0.0001 | 0.0243, (0.0029), < 0.0001 | |
Male | 0.0662, (0.1111), 0.5515 | 0.0501, (0.0637), 0.4330 | 0.0356, (0.0747), 0.6331 | 0.0099, (0.0782), 0.8985 | |
HDL | 0.0052, (0.0116), 0.6537 | 0.0058, (0.0024), 0.0195 | 0.0172, (0.0034), < 0.0001 | 0.0124, (0.0031), < 0.0001 | |
Time | – | 0.0201, (0.0102), 0.0530 | 0.0127, (0.0149), 0.3957 | − 0.0225, (0.0164), 0.1710 | |
Random effects | Zero part variance | – | 1.0528 | 0.1894 | 0.4409 |
Non zero part variance | – | 0.1620 | 0.2438 | 0.3357 | |
Covariance | – | – | 0.2149 | 0.3847 |