Table 2

Annual acute-care service usea for switchers and continuers on the initial antipsychotic

Patients continuing with their initial antipsychotics (N = 376)

Patients switching antipsychotics (N = 156)

p-value


Total Days in Study

110,482

52,288

Mean Days in Study per patient, days

293.8

335.2

Hospitalization

% of patients

16.0

26.3

<.001

Duration, days

1215

996

Rateb

1.10%

1.90%

.014

Number of hospital admissions

115

78

Ratec

0.11%

0.15%

.013

Partial hospitalization/day treatment centers

% of patients

10.6

18.0

.054

Duration, days

3,657

1,561

Rateb

3.35%

3.04%

.491


Patients continuing with their initial antipsychotics (N = 376)

Patients switching antipsychotics (N = 156)

p-value


Number of admissions to partial hospitals/day treatment centers

65

45

Ratec

0.06%

0.09%

.306

Crisis service

% of patients

12.0

18.0

<.001

Number of admissions

78

97

Rateb

0.07%

0.20%

.011

Any acute-care service

% of patients

28.5

42.3

<.001

Number of admissions

258

220

Ratec

0.24%

0.44%

<.001


p values based on propensity score adjusted bootstrap resampling.

aExcluding patients with any crisis event at baseline.

bRate = number of days with each service divided by the total number of days in the study.

cRate = number of admissions divided by the total number of days of treatment

Note: the denominator for the rate of partial hospitalization/day treatment days excludes hospitalization days. The denominator for the rate of crisis days excludes hospitalization and partial hospitalization/day treatment days. The denominator for admissions also excludes non-admission hospitalizations and partial hospital/day treatment days.

Faries et al. BMC Psychiatry 2009 9:54   doi:10.1186/1471-244X-9-54

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