Table 4 Items with DIF across boys and girls
Item | Gender | a | b1 | b2 | b3 |
|---|---|---|---|---|---|
Bad breath | Boys | 0.63 | −3.01 | −1.05 | 3.14 |
(in both RSF:8 and ISF:8) | Girls | 0.52 | −2.50 | −0.04 | 5.38 |
(χ2 = 0.4, df = 1, p = 0.540) | (χ2 = 19.0, df = 3, p < 0.001) | ||||
Food caught between/in teeth | Boys | 0.65 | −5.00 | −2.95 | 1.99 |
(in ISF:8) | Girls | 0.67 | −5.16 | −2.27 | 2.93 |
(χ2 < 0.1, df = 1, p = 0.943) | (χ2 = 12.6, df = 3, p = 0.006) | ||||
Concerned with other people think | Boys | 1.37 | −0.06 | 1.02 | 2.58 |
(in RSF:8) | Girls | 1.57 | −0.45 | 0.85 | 2.69 |
(χ2 = 1.5, df = 1, p = 0.483) | (χ2 = 11.5, df = 3, p = 0.009) | ||||