Implementing the Keele stratified care model for patients with low back pain: an observational impact study

Table 2 IMPaCT Back study: the number of LBP patients and NHS physiotherapy treatment sessions by risk category

stratified care model risk category	pre-implementation: phase 1						post-implementation: phase 3						% change in mean number of treatment sessions between phases 1 and 3
	all patients^a		patients providing data at 6 months^b				all patients^a		patients providing data at 6 months^b
	number (%)		number (%)		mean number (sd) of treatment sessions		number (%)		number (%)		mean number (sd) of treatment sessions
Low	136	(37)	81	(35)	1.05	(2.3)	214	(39)	110	(35)	1.14	(3.3)	9
Medium	151	(41)	104	(45)	1.45	(0.8)	232	(42)	143	(46)	2.08	(3.0)	43
High	81	(22)	48	(21)	1.87	(2.8)	108	(20)	61	(19)	2.67	(3.9)	43
Total	368	(100)	233	(100)	1.40		554	(100)	314	(100)	1.87		33

sd standard deviation
^aSource: risk-category level data from Hill et al., [10, Table 1]
^bSource: risk-category level data from Whitehurst et al., [13, web appendix table 3b]

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