Table 3

CFS/ME assessments (2009–2010) by deprivation quartiles based on full postcode data

Service	A	B	C	D	E	F	G
Number of assessments in local PCTs per year	191	334	135	352	197	201	155
Total adult population living in local PCTs	678532	1394480	1341530	1226571	792989	1076718	1064844
Assessments per 1000 adults per year	0.28	0.24	0.10	0.29	0.25	0.19	0.15
Mean IMD score	13.4	16.6	18.3	16.9	20.0	28.5	24.7
Proportion of black and ethnic minority adults (%)	2.6	3.2	3.4	4.0	4.1	4.8	4.7
Proportion of Asian adults (%)	0.8	1.1	1.6	1.4	2.4	2.5	3.5
Index of Multiple Deprivation (IMD)
Rate per 1000 adults per year*	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)
First quartile (least deprived)	0.30 (0.15 to 0.57)	0.25 (0.16 to 0.39)	0.09 (0.04 to 0.17)	0.29 (0.19 to 0.42)	0.41 (0.22 to 0.75)	0.26 (0.15 to 0.45)	0.18 (0.09 to 0.33)
Second quartile	0.29 (0.15 to 0.56)	0.23 (0.15 to 0.35)	0.12 (0.06 to 0.23)	0.28 (0.19 to 0.42)	0.37 (0.20 to 0.69)	0.18 (0.11 to 0.31)	0.15 (0.08 to 0.28)
Third quartile	0.24 (0.13 to 0.47)	0.22 (0.15 to 0.34)	0.11 (0.06 to 0.22)	0.29 (0.19 to 0.43)	0.27 (0.14 to 0.49)	0.15 (0.09 to 0.26)	0.15 (0.08 to 0.28)
Fourth quartile (most deprived)	0.32 (0.16 to 0.61)	0.25 (0.16 to 0.39)	0.09 (0.05 to 0.17)	0.27 (0.18 to 0.40)	0.23 (0.13 to 0.43)	0.14 (0.08 to 0.25)	0.11 (0.06 to 0.20)
Rate ratio (95% CI) per IMD quartile^†	1.00 (0.88 to 1.13)	1.00 (0.92 to 1.08)	1.01 (0.90 to 1.13)	1.00 (0.93 to 1.07)	0.82 (0.73 to 0.92)	0.81 (0.74 to 0.89)	0.87 (0.78 to 0.97)
	P_trend=0.99	P_trend=0.94	P_trend=0.85	P_trend=0.98	P_trend=0.001	P_trend< 0.001	P_trend=0.009

*Means and 95% CIs estimated from the negative bionomial regression model incorporating quartile as categorical variable.
†P_trend across quartiles as linear variable in the negative bionomial regression model.
PCT, Primary Care Trust; CFS/ME, chronic fatigue syndrome or myalgic encephalomyelitis.