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Table 6 Measures of validity of UTHSR data against “gold standard” based on 115 patient records, 2008–2011

From: The University of Texas Houston Stroke Registry (UTHSR): implementation of enhanced data quality assurance procedures improves data quality

Categorical variables

Dichotomous variables

UTHSR vs. “gold standard”

F*

N

Agreement (%)

Sensitivity (%) (95% CI)

Specificity (%) (95% CI)

Gender

Male

43

85

100

100 (92.0, 100)

100 (92.0, 100)

Stroke type

Infarct

62

115

100

100 (94.2, 100)

100 (93.3, 100)

ICH

31

115

100

100 (88.8, 100)

100 (95.7, 100)

TIA

2

115

100

100 (15.8, 100)

100 (96.8, 100)

Hospital arrival mode

Air

35

115

97.4

97.2 (85.5, 99.9)

97.5 (91.2, 99.7)

Ambulance

59

115

97.4

95.2 (86.5, 99.0)

100 (93.3, 100)

tPA therapy

Yes

25

115

100

100 (86.3, 100)

100 (96.0, 100)

tPA location

MHH-TMC

13

25

100

100 (75.3, 100)

100 (73.5, 100)

IA therapy

No

13

115

98.3

99.0 (94.6, 99.9)

92.9 (66.1, 99.8)

Atrial fibrillation in hospital

Yes

19

115

99.1

99.0 (94.6, 99.9)

99.0 (94.3, 99.9)

Anti-thrombotic medication

Yes

52

78

100

100 (82.4, 100)

100 (86.8, 100)

DVT prophylaxis

Yes

78

85

100

100 (95.4, 100)

100 (59.0, 100)

Patient education

Yes

63

78

100

100 (94.3, 100)

100 (78.2, 100)

Wake up stroke

Yes

11

78

98.7

91.7 (61.5, 99.8)

100 (94.6, 100)

Rehabilitation evaluation

Yes

67

78

100

100 (94.6, 100)

100 (72.0, 100)

Symptomatic hemorrhage

Yes

2

115

100

100 (15.8, 100)

100 (96.8, 100)

Disposition at discharge

Death

17

115

100

100 (80.5, 100)

100 (96.3, 100)

Home

43

115

98.3

100 (91.8, 100)

97.2 (90.3, 99.7)

Inpatient rehabilitation

18

115

100

100 (81.5, 100)

100 (96.3, 100)

Skilled nursing facility

4

111

96.5

NR

100 (99.9, 100)

Initial presentation

MHH

76

115

99.1

100 (95.3, 100)

97.4 (86.5, 99.9)

Smoker

Yes

20

78

100

100 (83.2, 100)

100 (94.0, 100)

Continuous variables

 

N

Agreement (%)

Correlation (95% CI)

MD(95% CI)

Age (years)

 

115

98.3

0.96 (0.94, 0.97)

0.5 (−0.3, 1.2)

Onset time (minutes)

 

72

97.2

1.00 (1.00, 1.00)

6.3 (−3.0, 15.5)

Arrival time (minutes)

 

115

85.2

1.00 (1.00, 1.00)

26.7 (−36.3, 89.6)

tPA time (minutes)

 

23

95.7

1.00 (1.00, 1.00)

−0.04 (−0.13, 0.05)

CT Time (minutes)

 

52

80.8

1.00 (1.00, 1.00)

20.9 (−19.7, 61.4)

Glucose

 

78

96.2

0.86 (0.79, 0.91)

−5.9 (−15.6, 3.8)

Creatinine

 

78

98.7

0.99 (0.99, 1.00)

0.003 (−0.003, 0.008)

LDL

 

86

97.7

0.96 (0.94, 0.98)

114.9 (−113.5, 343.3)

INR

 

104

94.2

0.99 (0.99, 1.00)

−0.003 (−0.013, 0.006)

mRS on discharge

 

104

98.1

0.99 (0.99, 1.00)

0 (−0.03, 0.03)

  1. N = Where both UTHSR and gold standard data have values; 95% CI = 95% Confidence Interval; ✝ MD = Mean Difference, (calculated as UTHSR minus the “gold standard”).
  2. NR = Not reported because there were no observations in UTHSR in the category of “Skilled Nursing Facility”; * F = Frequency of observations for each level of dichotomous variable reported.