Table 1 Accuracy of VA database for gout-related visits
From: Veterans Affairs databases are accurate for gout-related health care utilization: a validation study
| Â | True | True | False | False | Sensitivity | Specificity | PPV | NPV | Kappa |
|---|---|---|---|---|---|---|---|---|---|
Positive | Negative | Positive | Negative | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | |
(n/N) | (n/N) | (n/N) | (n/N) | ||||||
Main analyses (number = 85), including only patients with outpatient, inpatient, ER or Urgent care visits | |||||||||
All visits (number = 85) | 18/85 | 61/85 | 3/85 | 3/85 | 0.86 | 0.95 | 0.86 | 0.95 | 0.81 |
(0.78, 0.93) | (0.91, 1.00) | (0.78, 0.93) | (0.91, 1.00) | (0.66, 0.96) | |||||
Outpatient visits only (number = 76) | 16/76 | 55/76 | 3/76 | 2/76 | 0.89 | 0.95 | 0.84 | 0.96 | 0.82 |
(0.82, 0.96) | (0.90, 0.99) | (0.76, 0.92) | (0.93, 1.00) | (0.67, 0.97) | |||||
Inpatient, emergent or urgent care visits only (number = 9) | 2/9 | 6/9 | 0/9 | 1/9 | 0.67 | 1.00 | 1.00 | 0.86 | 0.73 |
(0.57, 0.77) | (N/A) | (N/A) | (0.78, 0.93) | (0.24, 1.00) | |||||
Sensitivity analyses (number = 108), including all visits in database a | |||||||||
All visits (number = 108) | 19/108 | 79/108 | 6/108 | 4/108 | 0.83 | 0.93 | 0.76 | 0.95 | 0.73 |
(0.75, 0.90) | (0.88, 0.98) | (0.68, 0.84) | (0.91, 0.99) | (0.57, 0.89) | |||||
Outpatient visits only (number = 99) | 17/99 | 73/99 | 6/99 | 3/99 | 0.85 | 0.92 | 0.74 | 0.96 | 0.73 |
(0.78, 0.92) | (0.87, 0.97) | (0.66, 0.82) | (0.92, 1.00) | (0.57, 0.90) | |||||
Inpatient, emergent or urgent care visits only (number = 9) | 2/9 | 6/9 | 0/9 | 1/9 | 0.67 | 1.00 | 1.00 | 0.86 | 0.73 |
(0.57, 0.77) | (N/A) | (N/A) | (0.78, 0.93) | (0.24, 1.00) | |||||