Table 5 Multidimensional 5-item partial credit model scale reliability and properties (Reaching Married Adolescents Study, 2016–2019, n = 559)
Items | Item response theory | |||
|---|---|---|---|---|
Item difficulty (SE) | Weighted mean square error fit (CI) | DIF: Zarma (vs. Hausa) | Point-biserial (response 0, 1, 2) | |
1. Use family planning | 0.558 (0.051) | 1.16 (0.83, 1.17) | 0.206 | − 0.65, 0.01, 0.68 |
2. Force sex | 2.429 (0.094) | 1.08 (0.84, 1.16) | − 0.282 | − 0.42, 0.19, 0.39 |
3. Refuse sex | 1.810 (0.084) | 0.87 (0.86, 1.14) | − 0.022 | − 0.64, 0.25, 0.57 |
4. Argue | 1.589 (0.082) | 1.21 (0.85, 1.15) | − 0.032 | − 0.57, 0.11, 0.57 |
5. Go out | 1.535 (0.082) | 0.87 (0.85, 1.15) | − 0.316 | − 0.70, 0.22, 0.63 |
Dimension correlation: 0.847 | ||||