Results from questionnaire
| Questionnaire | Lower age limit (months) | Values | Mann–Whitney test | ||
|---|---|---|---|---|---|
| Unilateral | Bilateral | z | p Value | ||
| Speech section of the SSQ | 18 | 5.88 (4.65 to 7.68) 20/20 | 7.53 (5.80 to 8.37) 30/30 | -2.06 | 0.04 |
| Spatial section of the SSQ | 18 | 4.85 (2.43 to 5.88) 20/20 | 7.47 (6.22 to 8.91) 30/30 | −3.71 | 0.00 |
| Qualities section of the SSQ | |||||
| 18 | 7.16 (6.44 to 8.15) 20/20 | 7.60 (7.24 to 8.47) 30/30 | −1.78 | 0.08 | |
| Visual analogue scale | 18 | 0.90 (0.76 to 0.95) 20/20 | 0.91 (0.85 to 1.00) 30/30 | −1.41 | 0.16 |
| Health Utilities Index | 60 | 0.78 (0.69 to 0.85) 14/14 | 0.83 (0.64 to 0.85) 20/20 | −0.13 | 0.91 |
In the ‘Values’ columns, cells contain median scores, 25th and 75th percentiles (in parentheses), and the number of parents contributing data relative to the number of parents whose child was above the age limit for that questionnaire (in italics). The standardised Mann–Whitney statistic, z, is listed alongside the associated p value.