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Table 5 Comparing those with and without common mental health problems within the four study populations

From: Detecting referral and selection bias by the anonymous linkage of practice, hospital and clinic data using Secure and Private Record Linkage (SAPREL): case study from the evaluation of the Improved Access to Psychological Therapy (IAPT) service

 

In-depth study population

Referred to IAPT

Hospital adult population

GP listed adult population

People with NO record of Common Mental Health Problem (CMHP):

% of population

10.80%

30.80%

85.20%

89.90%

Age (SEM)

49.3 (3.4)

40.2 (0.74)

46.5 (0.05)

42.3 (0.05)

Gender (F%: M%)

61.1%: 38.9%

55.8%: 44.2%

55.0%: 45.0%

47.7%: 53.3%

IMD (SEM)

36.8% (3.2)

40.4 (0.72)

37.6 (0.07)

37.7 (0.04)

People with a Common Mental Health Problem (CMHP):

% of population

89.20%

69.20%

14.80%

10.10%

Age (SEM)

42.4 (1.1)

40.2 (0.46)

44.7 (0.19)

43.6 (0.15)

Gender (F%: M%)

75.7%: 24.3%

70.0%: 30.0%

69.7%: 30.5%

67.4%: 32.6%

IMD (SEM)

35.5 (1.3)

38.0 (0.53)

38.1 (0.17)

37.6 (0.13)

Total population size and differences between people with and without a CMHP

Total population size

100%

100%

100%

100%

 

(n = 166)

(n = 1,118)

(n = 53,318)

(n = 121,199)

Age difference

-6.9 years

None

-1.8 years

+ 1.5 years

(Significance t-test)

(p < 0.05)

(n.s.)

(p < 0.001)

(p < 0.001)

Gender differences

14.60%

14.20%

14.70%

19.70%

(Pearson Chi-square)

(p < 0.001)

(p < 0.001)

(p < 0.001)

(p < 0.001)

IMD difference

-1.3

-2.4

0.5

-0.1

(Significance t-test)

(n.s)

(p < 0.05)

(p < 0.01)

(n.s.)