Table 3.

Primary outcome measures^*

	Difference or odds ratio (95% confidence interval)	P value
Auditory comprehension†	4.1 (0.5 to 7.6)	0.025
Expressive language†	1.4 (−2.1 to 4.8)	0.44
Phonology error rate†	−4.4 (−12.0 to 3.3)	0.26
Bristol language development scale‡	0.1 (−0.4 to 0.6)	0.73
Improvement by 12 months on the clinical criterion on which child entered study§	1.3 (0.67 to 2.4)	0.46

^*Data were missing for all measures in both groups: analyses were based on 64 (therapy group) and 80 children (watchful waiting group) for auditory comprehension; 63 and 77 for expressive language; 57 and 62 for the phonology error rate; and 71 and 84 for improvement by 12 months. 

^†Difference in means obtained from repeated measures analysis of covariance with adjustment for baseline assessment of the outcome measure, with the difference for the therapy group minus that for watchful waiting averaged across the two follow up times. 

^‡Difference in means obtained from analysis of covariance for 12 month scores adjusted for baseline assessment of the outcome measure. 

^§Odds ratios obtained from logistic regression.