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Table 4 PCS Model Corrected For Response Bias (N = 1605)

From: Assessing response bias from missing quality of life data: The Heckman method

  

95% Confidence Interval

Variables

Coefficient

Lower Limit

Upper Limit

Mean patient age (per 1 year increment)

-0.07

-0.11

-0.03

Male gender

-1.00

-4.05

2.04

Caucasian race

-0.67

-1.62

0.28

Hx of MI

-0.89

-2.39

0.62

Hx of Chronic heart failure

-2.95

-4.22

-1.69

Hx of Coronary artery bypass graft surgery

-3.16

-4.23

-2.09

Hx of Percutaneous coronary intervention

-1.24

-2.75

0.28

Substance or alcohol abuse

-0.17

-1.85

1.52

Current smoker

-0.48

-1.48

0.51

Dementia

-0.77

-2.89

1.34

COPD

-3.91

-4.91

-2.91

Stroke

-2.92

-4.14

-1.70

Depression

-4.68

-6.06

-3.31

Arthritis

-1.71

-2.75

-0.67

Diabetes mellitus

-2.33

-3.45

-1.20

Coronary revascularization during index admission

1.76

0.32

3.19

Cardiogenic shock

1.44

-3.72

6.60

Hypotensive episode

0.48

-1.50

2.46

Positive stress test

1.06

-0.38

2.50

Admitted to Tertiary VA

-0.78

-1.81

0.25

ST-segment elevation MI on ECG

2.41

0.97

3.85

Mean serum creatinine (per 1 mg/dl increment)

-0.66

-1.11

-0.22

Left bundle branch block on ECG

0.05

-2.30

2.39

Cardiac catheterization during index admission

0.60

-0.41

1.60

Discharge diagnosis Unstable Angina (vs. MI)

-0.62

-1.42

0.19

Inverse Mills Ratio *

-2.15

-5.66

1.37

  1. * Inverse Mills Ratio: Variable derived from the Heckman Selection Equation; MI: myocardial infarction; Hx: History; COPD: chronic obstructive pulmonary disease; ECG: electrocardiogram