| PLPH Yes (n = 22) | PLPH No (n = 48) | P Value |
---|---|---|---|
 | n (%) or Mean ± SD | n (%) or Mean ± SD |  |
Sex, Female | 7 (31.8%) | 20 (41.7%) | 0.598 |
Age (year) | 50.7 ± 14.2 | 52.8 ± 13.7 | 0.545 |
Drainage amount (mL) | 24.5 ± 12.9 | 23.6 ± 8.3 | 0.747 |
Opening pressure (cm H20) | 12.9 ± 5.1 | 13.0 ± 5.8 | 0.968 |
Closing pressure (cm H20) | 10.9 ± 4.3 | 10.2 ± 5.7 | 0.764 |
Experience of PLPH | Â | Â | Â |
   Yes | 4 (57.1%) | 2 (11.8%) | 0.038 |
   No | 3 (42.9%) | 15 (88.2%) |  |
Physician | Â | Â | Â |
   Intern | 1 (5%) | 2 (4.3%) | 1.000 |
   First-year Resident | 18 (85%) | 43 (91.4%) |  |
   Second-year Resident | 1 (5%) | 2 (4.3%) |  |
LP attempts | Â | Â | Â |
   1 | 17 (77.3%) | 34 (72.4%) |  |
   2 | 3 (13.6%) | 6 (12.9%) | 1.000 |
   3 | 2 (9.1%) | 5 (10.5%) |  |
   4 | 0 | 1 (2.1%) |  |
   7 | 0 | 1 (2.1%) |  |
Leukocytosis in CSF (WBC > 5 mm3) | 4 (18.2%) | 10 (20.8%) | 0.797 |
Chronic headache before LP | Â | Â | Â |
   Yes | 6 (27.3%) | 1 (2.1%) |  |
   No | 16 (72.7%) | 47 (97.9%) | 0.003 |