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Table 2 BPRS-sumscores in two regions in South Limburg, where baseline is the moment of the start of the CNCM in region 2004: descriptives and regression results (Only baseline and yearly evaluation assessments were included, to avoid bias)

From: Systematic monitoring of needs for care and global outcomes in patients with severe mental illness

 

Descriptives

Regression results

 

REGION

Baseline

1 year

follow-up

≥ 2 year

follow up

1 year vs

baselinea,

β (95% CI)

2-3year vs

baselinea,

β (95% CI)

Difference in difference = interaction termb

number of subjects

1998

172 (175)

107 (107)

60(56)

   

(assessments)

2004

393(380)

251(248)

205(196)

   

BPRS manic excitement, mean (sd)

1998

1.32 (0.37)

1.62 (0.67)

1.58 (0.82)

0.38

(-0.15; 0.91)

0.49

(-0.45; 1.42)

1 yr β = -0.52

p = 0.11

New patients

2004

1.55 (0.88)

1.41 (0.71)

1.43 (0.52)

-0.13

(-0.49; 0.22)

0.04

(-1.00;1.07)

2-3 yr β = -0.34

p = 0.5

BPRS manic excitement, mean (sd)

1998

1.28 (0.49)

1.26 (0.42)

2.00 (1.78)

0.14

(-0.31; 0.58)

0.62

(0.004;1.24)*

1 yr β = -0.17

p = 0.5

2-3 years in care

2004

1.53 (0.72)

1.49 (0.58)

1.24 (0.32)

-0.04

(-0.32;0.24)

-0.13

(-0.46-0.20)

2-3 yr β = -0.75

p = 0.04

BPRS manic excitement, mean (sd)

1998

1.67 (0.79)

1.77 (0.87)

1.69 (0.83)

0.08

(-0.07; 0.23)

-0.03

(-0.22; 0.15)

1 yr β = -0.03

p = 0.7

Chronic patients

2004

1.64 (0.75)

1.63 (0.77)

1.79 (0.85)

0.04

(-0.06; 0.14)

0.18

(0.07; 0.29)*

2-3 yr β = 0.21

p = 0.054

BPRS positive symptoms, mean (sd)

1998

1.99 (1.10)

1.91 (0.97)

2.12 (1.33)

-0.03

(-0.13;0.06)b

0.12

(0.02; 0.23) c

χ2= 0.16

p = 0.92

 

2004

1.88 (1.00)

1.78 (0.94)

2.00 (1.09)

-0.03

(-0.13;0.06)b

0.12

(0.02; 0.23) c

 

BPRS negative symptoms, mean (sd)

1998

1.84 (0.95)

1.80 (0.83)

1.90 (0.98)

0.02

(-0.14;0.18)

-0.09

(-0.29; 0.12)

χ 2 = 8.95 p = 0.011

 

2004

1.72 (0.75)

1.71 (0.83)

1.94 (1.08)

0.02 (-0.08;0.13)

0.36

(0.11; 0.62)

 

BPRS depression/anxiety, mean (sd)

1998

2.40 (1.11)

2.96(0.89)

1.25 (0.35)

0.56

(-0.19; 1.33)

-0.30

(-1.65; 1.06)

1 yr β = -1.23

p = 0.008

New patients

2004

2.69 (1.20)

1.80 (1.00)

2.44 (1.30)

-0.67

(-1.17;-0.17)**

0.71

(-0.78; 2.20)

2-3 yr β = 0.14

p = 0.85

BPRS depression/anxiety, mean (sd)

1998

2.70 (1.11)

2.30 (1.15)

2.70 (1.27)

-0.22

(-0.84; 0.40)

0.62

(-0.27; 1.50)

1 yr β = -0.02

p = 0.96

2-3 years in care

2004

2.53 (1.16)

2.39 (1.12)

2.34 (1.27)

-0.24

(-0.64;0.17)

-0.17

(-0.64; 0.30)

2-3 yr β = -0.78

p = 0.13

BPRS depression/anxiety, mean (sd)

1998

2.30 (1.08)

2.31 (0.98)

2.45 (1.16)

-0.004

(-0.22;0.21)

0.05

(-0.22; 0.31)

1 yr β = 0.14

p = 0.27

Chronic patients

2004

2.51 (1.18)

2.34 (1.06)

2.44 (1.09)

-0.15

(-0.29;-0.006)*

-0.00

(-0.15; 0.15)

2-3 yr β = -0.05

p = 0.75

  1. aAfter controlling for confounders
  2. bIs the regression coefficient in REGION-2004 significantly different from the regression coefficient in REGION-1998?
  3. cBecause the interaction region * (year since start in REGION-2004) was not statistically significant, this term was deleted from the regression model and, therefore, differences between baseline and follow up are exactly the same in both regions.
  4. *p < 0.05
  5. **p < 0.01
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BMC Psychiatry

ISSN: 1471-244X

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