Analysis of risk factors of elevated PRL
| Factors | OR RIS/OLZ | 95% Cl RIS/OLZ | P value RIS/OLZ |
| Age, years | 0.978/0.981 | 0.905 to 1.055/0.812 to 1.185 | 0.561/0.839 |
| Gender | 0.371/0.186 | 0.209 to 0.658/0.080 to 0.432 | 0.001**/<0.001** |
| Age of onset, years | 1.016/0.990 | 0.936 to 1.103/0.818 to 1.197 | 0.706/0.914 |
| Illness duration, years | 0.998/1.032 | 0.922 to 1.080/0.852 to 1.250 | 0.961/0.749 |
| Medication time, years | 0.978/1.084 | 0.884 to 1.081/0.870 to 1.350 | 0.658/0.658 |
| Body mass index, kg/m2 | 1.073/0.911 | 0.995 to 1.158/0.816 to 1.017 | 0.068/0.097 |
| Dose, mg/d | 0.729/0.896 | 0.613 to 0.868/0.833 to 0.964 | <0.001**/0.003* |
| Fasting plasma glucose, mmol/l | 1.372/2.479 | 1.050 to 1.792/1.423 to 4.319 | 0.020*/0.001* |
| Total cholesterol, mmol/l | 0.934/1.162 | 0.672 to 1.299/0.733 to 1.842 | 0.685/0.524 |
| Triglycerides, mmol/l | 1.365/1.082 | 0.941 to 1.979/0.717 to 1.634 | 0.101/0.707 |
*p≤0.05
**p≤0.001
OLZ, olanzapine; PRL, prolactin; RIS, risperidone.