Stratum-specific likelihood ratios of the PVI score for patients with definite and possible ITP
| Definite ITP . | |||||
|---|---|---|---|---|---|
| PVI score . | PVI interval . | Definite ITP . | Non-ITP . | Proportion with definite ITP . | Stratum-specific likelihood ratios (95% CI) . |
| (n = 104) . | (n = 339) . | ||||
| 0 | PVI ≤ −10 | 0 | 172 | 0/172 (0.0%) | LR− = 0 (0-0) |
| 1 | −10 < PVI ≤−5 | 1 | 45 | 1/46 (2.2%) | SSLR+ = 0.07 (0.01-0.36) |
| 2 | −5 < PVI ≤ 0 | 0 | 47 | 0/47 (0.0%) | SSLR+ = 0 (0-0) |
| 3 | 0 < PVI ≤ 5 | 6 | 39 | 6/45 (13.3%) | SSLR+ = 0.5 (0.23-1.12) |
| 4 | 5 < PVI ≤ 8 | 8 | 14 | 8/22 (36.4%) | SSLR+ = 1.86 (0.82-4.22) |
| 5 | 8 < PVI ≤ 12 | 52 | 20 | 52/72 (72.2%) | SSLR+ = 8.47 (5.34-13.44) |
| 6 | PVI > 12 | 37 | 2 | 37/39 (94.9%) | SSLR+ = 60.3 (17.08-212.88) |
| Definite ITP . | |||||
|---|---|---|---|---|---|
| PVI score . | PVI interval . | Definite ITP . | Non-ITP . | Proportion with definite ITP . | Stratum-specific likelihood ratios (95% CI) . |
| (n = 104) . | (n = 339) . | ||||
| 0 | PVI ≤ −10 | 0 | 172 | 0/172 (0.0%) | LR− = 0 (0-0) |
| 1 | −10 < PVI ≤−5 | 1 | 45 | 1/46 (2.2%) | SSLR+ = 0.07 (0.01-0.36) |
| 2 | −5 < PVI ≤ 0 | 0 | 47 | 0/47 (0.0%) | SSLR+ = 0 (0-0) |
| 3 | 0 < PVI ≤ 5 | 6 | 39 | 6/45 (13.3%) | SSLR+ = 0.5 (0.23-1.12) |
| 4 | 5 < PVI ≤ 8 | 8 | 14 | 8/22 (36.4%) | SSLR+ = 1.86 (0.82-4.22) |
| 5 | 8 < PVI ≤ 12 | 52 | 20 | 52/72 (72.2%) | SSLR+ = 8.47 (5.34-13.44) |
| 6 | PVI > 12 | 37 | 2 | 37/39 (94.9%) | SSLR+ = 60.3 (17.08-212.88) |
| Possible ITP . | |||||
|---|---|---|---|---|---|
| PVI score . | PVI interval . | Possible ITP . | Non-ITP . | Proportion with possible ITP . | Stratum-specific likelihood ratios (95% CI) . |
| (n = 398) . | (n = 339) . | ||||
| 0 | PVI ≤ −10 | 57 | 172 | 57/229 (24.9%) | LR− = 0.28 (0.22-0.37) |
| 1 | −10 < PVI ≤−5 | 44 | 45 | 44/89 (49.4%) | SSLR+ = 0.83 (0.57-1.23) |
| 2 | −5 < PVI ≤ 0 | 62 | 47 | 62/109 (56.9%) | SSLR+ = 1.12 (0.79-1.59) |
| 3 | 0 < PVI ≤ 5 | 60 | 39 | 60/99 (60.6%) | SSLR+ = 1.31 (0.9-1.9) |
| 4 | 5 < PVI ≤ 8 | 51 | 14 | 51/65 (78.5%) | SSLR+ = 3.1 (1.76-5.46) |
| 5 | 8 < PVI ≤ 12 | 87 | 20 | 87/107 (81.3%) | SSLR+ = 3.71 (2.34-5.86) |
| 6 | PVI > 12 | 37 | 2 | 37/39 (94.9%) | SSLR+ = 15.76 (4.42-56.22) |
| Possible ITP . | |||||
|---|---|---|---|---|---|
| PVI score . | PVI interval . | Possible ITP . | Non-ITP . | Proportion with possible ITP . | Stratum-specific likelihood ratios (95% CI) . |
| (n = 398) . | (n = 339) . | ||||
| 0 | PVI ≤ −10 | 57 | 172 | 57/229 (24.9%) | LR− = 0.28 (0.22-0.37) |
| 1 | −10 < PVI ≤−5 | 44 | 45 | 44/89 (49.4%) | SSLR+ = 0.83 (0.57-1.23) |
| 2 | −5 < PVI ≤ 0 | 62 | 47 | 62/109 (56.9%) | SSLR+ = 1.12 (0.79-1.59) |
| 3 | 0 < PVI ≤ 5 | 60 | 39 | 60/99 (60.6%) | SSLR+ = 1.31 (0.9-1.9) |
| 4 | 5 < PVI ≤ 8 | 51 | 14 | 51/65 (78.5%) | SSLR+ = 3.1 (1.76-5.46) |
| 5 | 8 < PVI ≤ 12 | 87 | 20 | 87/107 (81.3%) | SSLR+ = 3.71 (2.34-5.86) |
| 6 | PVI > 12 | 37 | 2 | 37/39 (94.9%) | SSLR+ = 15.76 (4.42-56.22) |
LR−, likelihood ratio for a negative result; SSLR+, stratum-specific likelihood ratio for a positive result within the stratum indicated.