Table 2. Structural equation models parameter estimates for growth curves of bleeding (PBAC Score), IUD satisfaction (5-point Likert), and cramping (6-level MSQ item) using multiple imputation (30 imputations).
| Outcome: | Bleeding | IUD Satisfaction | Cramping |
|---|---|---|---|
| Link Function: | Negative Binomial | Ordered logistic | Ordered logistic |
| Time (study month) | -0.055* | 0.154** | -0.280*** |
| (-2.384) | (2.652) | (-4.378) | |
| Intercept | 5.126*** | ||
| (54.695) | |||
| Overdispersion (ln(α)) | -0.620*** | ||
| (-8.039) | |||
| Random intercept variance | 0.361*** | 3.458*** | 4.474*** |
| (4.210) | (3.839) | (4.203) | |
| Nj (Assessments) | 462 | 462 | 462 |
| Ni (Subjects) | 77 | 77 | 77 |
Note: t statistics in parentheses;
* p<0.05;
** p<0.01;
*** p<0.001
PBAC—Pictorial Blood Assessment Chart; IUD—intrauterine device; MSQ—Menstrual Symptoms Questionnaire