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Table 3 Regression Results for Paraiba (PB) and Sao Paulo (SP), showing time trend estimates and 95 % confidence intervals, adjusted R2 and p-value from the F test

From: Does Pharmaceutical Pricing Transparency Matter? Examining Brazil’s Public Procurement System

Drug

Sample size

Time trend estimate PB

Time trend estimate SP

Adj R2

P-value

Aciclovir 200

59

0.878 (0.795, 0.981)

0.931 (0.783, 1.131)

0.373

<0.0001

Amoxicillin 500

207

1.100 (0.986, 1.268)

0.981 (0.916, 1.058)

0.695

<0.0001

Aspirin 100

77

1.032 (0.919, 1.243)

1.045 (0.925, 1.246)

0.644

<0.0001

Atenolol 50

31

0.939 (0.762, 1.076)

0.966 (0.694, 1.553)

0.09

0.171

Captopril 12,5

48

1.218 (0.998, 1.466)

1.053 (0.703, 1.541)

0.65

<0.0001

Diazepam 5

54

1.059 (0.986, 1.186)

0.999 (0.858, 1.178)

0.338

<0.0001

Dipyrone 500

269

1.070 (0.944, 1.260)

0.993 (0.936, 1.052)

0.481

<0.0001

Enalapril 10

42

1.050 (0.857, 1.388)

1.286 (0.950, 1.567)

0.227

0.008

Fluoxetin 20

36

0.931 (0.523, 1.477)

1.098 (0.826, 1.585)

0.085

0.151

Furosemide 40

84

1.049 (0.921, 1.167)

0.961 (0.789, 1.140)

0.575

<0.0001

Glibenclamide 5

41

1.074 (0.938, 1.235)

1.201 (0.851, 2.133)

0.22

0.011

Hydrochlorothiazide 25

30

1.237 (0.987, 2.255)

0.856 (0.489, 1.174)

0.371

0.003

Metformin 850

37

0.856 (0.777, 0.928)

0.939 (0.771, 1.037)

0.242

0.011

Omeprazol 20

111

0.862 (0.692, 1.046)

0.967 (0.860, 1.082)

0.368

<0.0001

Paracetamol 500

170

1.146 (1.031, 1.268)

1.074 (0.962, 1.190)

0.735

<0.0001

Propranolol 40

57

1.022 (0.860, 1.344)

1.024 (0.826, 1.295)

0.2

0.003

Ranitidine 150

105

1.034 (0.957, 1.115)

1.127 (1.021, 1.246)

0.478

<0.0001

Tramadol 50

55

0.761 (0.681, 0.949)

1.067 (0.847, 1.466)

0.46

<0.0001

Warfarin 5

40

0.837 (0.759, 0.975)

1.035 (0.899, 1.218)

0.626

<0.0001