Introduction
Materials and methods
Study populations
SAA procedure
Statistics
Results
Parameter | Subject group | p values from repository comparisons | ||||||
---|---|---|---|---|---|---|---|---|
PPMI repository | PDBP repository | |||||||
Case | Control | Total | Case | Control | Total | Case | Control | |
Total UPDRS scores non-parametric summary | ||||||||
Median | 50 | 4 | – | 48 | 5 | – | 0.727 | 0.371 |
IQR | 18.5 | 4 | – | 22 | 8 | – | ||
Min | 14 | 0 | – | 17 | 0 | – | ||
Max | 72 | 25 | – | 104 | 43 | – | ||
Demographics comparison | ||||||||
Age | ||||||||
Mean | 64.0 | 60.1 | 61.4 | 64.3 | 61.4 | 62.6 | 0.932 | 0.882 |
Median | 64.0 | 64.0 | 64.0 | 63.6 | 64.0 | 63.6 | ||
SD | 9.0 | 11.8 | 11.1 | 8.0 | 10.0 | 9.3 | ||
Min | 34.2 | 31.0 | 31.0 | 48.4 | 39.4 | 39.4 | ||
Max | 77.5 | 85.1 | 85.1 | 81.0 | 84.4 | 84.4 | ||
< 60 | 16 (29.1%) | 53 (48.6%) | 69 (42.1%) | 12 (29.3%) | 27 (47.4%) | 39 (39.8%) | ||
> 60 | 39 (70.9%) | 56 (51.4%) | 95 (57.9%) | 29 (70.7%) | 30 (52.6%) | 59 (60.2%) | ||
Race | ||||||||
Caucasian | 52 (94.5%) | 99 (90.8%) | 151 (92.1%) | 37 (90.2%) | 47 (82.5%) | 84 (85.7%) | 0.395 | 0.041 |
Black | 1 (1.8%) | 7 (6.4%) | 8 (4.9%) | 3 (7.3%) | 10 (17.5%) | 13 (13.3%) | ||
Other | 2 (3.6%) | 3 (2.8%) | 5 (3.0%) | 1 (2.4%) | 0 (0.0%) | 1 (1.0%) | ||
Ethnicity | ||||||||
Hispanic | 2 (3.6%) | 2 (1.8%) | 4 (2.4%) | 1 (1.6%) | 2 (3.5%) | 3 (2.5%) | 1.000 | 0.879 |
Not Hispanic | 53 (96.4%) | 107 (98.2%) | 160 (97.6%) | 59 (96.7%) | 54 (94.7%) | 113 (95.8%) | ||
Unknown | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 1 (1.6%) | 1 (1.8%) | 2 (1.7%) | ||
Sex | ||||||||
Male | 38 (69.1%) | 68 (62.4%) | 106 (64.6%) | 23 (56.1%) | 24 (42.1%) | 47 (48.0%) | 0.274 | 0.020 |
Female | 17 (30.9%) | 41 (37.6%) | 58 (35.4%) | 18 (43.9%) | 33 (57.9%) | 51 (52.0%) |
Metric | PDBP repository samples # controls—57, # PD—41 | PPMI repository samples # controls—109, # PD—55 |
---|---|---|
Classification method | Clinical diagnosis w/out DAT SPECT | Clinical diagnosis with DAT SPECT |
Accuracy | 85.7% (95% CI = 0.77–0.92) | 93.9% (CI = 0.89–0.97) |
Sensitivity | 80.5% (95% CI = 0.65–0.91) | 87.3% (CI = 0.76–0.95) |
Specificity | 89.5% (95% CI = 0.78–0.96) | 97.2% (CI = 0.92–0.99) |
Error rate | 14.3% (CI = 0.080–0.228) | 6.1% (CI = 0.030–0.109) |
PPV | 84.6% (95% CI = 0.69–0.94) | 94.1% (CI = 0.84–0.99) |
NPV | 86.4% (95% CI = 0.75–0.94) | 93.8% (CI = 0.88–0.98) |