Table 1.

Comparison NPTDA-estimated hours and actual hours of therapy intervention identified from activity analysis, within each direct intervention subscale

Therapy dependency subscale	Estimated hours/week From NPTDA		Actual hours/week From activity analysis		Comparative analysis
	Median (IQR)	Range	Median (IQR)	Range	Wilcoxon Z-value	P-value	Spearman rho	P-value
a) Estimates using the mid-point algorithm
Physical subscale	10.0 (7–11.8)	0–18	7.0 (6–9.1)	0–16	−3.4	0.001	0.71	<0.0001
Basic functions	2.0 (0.8–5.3)	0–15	1.5 (0.4–3.8)	0–6.5	−4.2	<0.001	0.93	<0.0001
Activities of daily living	1.5 (0.4–4.8)	0–7.5	2.0 (0.1–3.1)	0–6.0	−1.8	0.07	0.71	<0.0001
Cognitive	4.0 (1.3–6)	0–21.5	1.8 (0.5–3.1)	0–8.3	−3.9	<0.001	0.70	<0.0001
Discharge planning	2.0 (1–7.6)	0–14.5	2.0 (0.4–3.5)	0–10.5	−3.6	<0.001	0.88	<0.0001
Total	24.2 (16.9–27.4)	0–51.5	17.3 (14.6–26.4)	0–40	−3.9	<0.001	0.77	<0.0001
b) Estimates using the revised algorithm
Physical subscale	8.8 (5.6–10.6)	0–18	7.0 (6–9.1)	0–16	−1.7	0.09	0.69	<0.0001
Basic functions	1.3 (0.4–4.3)	0–13.5	1.5 (0.4–3.8)	0–6.5	−2.0	0.05	0.94	<0.001
Activities of daily living	2.3 (2–5)	0–8	2.0 (0.1–3.1)	0–6.0	−2.6	0.011	0.30	0.118
Cognitive	1.0 (0.3–3.8)	0–21	1.7 (0.5–3.1)	0–8.3	−0.2	0.86	0.45	0.014
Discharge planning	2.0 (1–6.1)	0–13.5	2.0 (0.4–3.5)	0–10.5	−3.3	0.001	0.66	<0.0001
Total	20.3 (16–24.9)	0–51.2	17.3 (14.6–26.4)	0–40	−1.4	0.15	0.70	<0.0001

NPTDA, Northwick Park Therapy Dependency Assessment.