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Table 2 Factor analysis for projection using time-series cross-section data on pharmacy service fees per pharmacy per quarter

From: Projection of future pharmacy service fees using the dispensing claims in hospital and clinic outpatient pharmacies: national health insurance database between 2006 and 2012

Category

Coefficienta

SDb

t

95% CI

p-value

Number of prescriptions per pharmacy per quarter

4.7

0.002

2.229

4.667

4.674

<  0.001

Average dispensing days of prescriptions per pharmacy per quarter

307.3

1.467

0.175

304.4

310.2

<  0.001

Ratio of patients aged 65 years and older

1082.3

70.193

0.013

944.8

1219.9

<  0.001

Conversion factor

494.8

2.056

0.201

490.7

498.8

<  0.001

Change of policy

−956.1

11.767

−0.068

− 979.2

− 933.1

<  0.001

Hospital type

 General hospital outpatient pharmacy c

6028.2

56.402

0.089

5917.6

6138.7

<  0.001

 Special hospital outpatient pharmacy d

1140.0

39.156

0.024

1063.2

1216.7

<  0.001

 Clinic outpatient pharmacy e

− 1494.5

101.889

−0.012

− 1694.2

− 1294.8

<  0.001

 Other f

−184.1

18.888

−0.008

− 221.2

− 147.1

<  0.001

Constant

−34,916.7

125.224

−0.232

−35,166.7

− 34,666.7

<  0.001

  1. aCosts in Korean won were converted into US$ by using the conversion rate of 1200 won/US$
  2. bStandard deviation
  3. cPharmacy that obtained more than 80% of prescriptions from general hospitals
  4. dPharmacy that obtained more than 80% of prescriptions from special hospitals
  5. ePharmacy that obtained more than 80% of prescriptions from clinics
  6. fPharmacy that was not c, d, or e