Table 3 Agreement between the results of the smartphone application and postal questionnaire
From: A smartphone application to objectively monitor music listening habits in adolescents
| N | Underestimation | Corresponded | Overestimation | kappa | 95% CI | p-value | |
|---|---|---|---|---|---|---|---|
| Frequency | 237 | 44 (18.6%) | 84 (35.4%) | 109 (46.0%) | 0.179 | 0.095 to 0.262 | < 0.001 |
| Listening time | 237 | 105 (44.3%) | 71 (30.0%) | 61 (25.7%) | 0.193 | 0.109 to 0.276 | < 0.001 |
| Listening level | 185 | 36 (19.5%) | 104 (56.2%) | 45 (24.3%) | 0.364 | 0.261 to 0.467 | < 0.001 |