Table 6.

Correlation values between PSQ-18 Parent Satisfaction Subsets and Subjective and Objective Speech Level in children of all ages

Variables	General Parent Satisfaction	Technical Quality	Interpersonal Manner	Communication	Financial Aspects	Time Spent with ST	Accessibility & Convenience
Objective Speech Level	.06	.03	–.41* (.010)	–.28	.14	–.34* (.04)	.21
Subjective Speech Level	.25	.18	–.12	.04	.33* (.045)	–.08	.37* (.02)

Note. p<.05. * p<.01. **. All statistically significant correlations, displayed as (r)

Total ST intervention duration, originally measured in ranges (<12 months, 1–2 years, 3–4 years, 5–6 years, 7–8 years, 9–10 years, >10 years), was converted into interval estimates of total intervention duration by multiplying ordinal categories by a relative numeric multiplier (0.5, 1.5, 3.5, 5.5, 7.5, 9.5, 10.5). After this conversion, ST cumulative intervention intensity, referred to as ST Cumulative Intensity, was calculated as the sum of (ST Dose [minutes per session])×(ST Dose Frequency)×(ST Length [years]).