Table 1 Demographic and Clinical Characteristics of the subjects
| Â | 4 hours supine recumbence (n = 35) | 1 hour supine recumbence (n = 35) | P Value |
|---|---|---|---|
|  | n(%) or Mean ± SD | n(%) or Mean ± SD |  |
Sex, Female | 14 (40%) | 13 (37.2%) | 0.806 |
Age (year) | 51.4 ± 13.9 | 52.9 ± 13.8 | 0.644 |
Drainage amount (mL) | 24.9 ± 11.0 | 22.8 ± 8.6 | 0.368 |
Opening pressure (cm H20) | 12.5 ± 4.3 | 13.5 ± 6.6 | 0.448 |
Closing pressure (cm H20) | 10.4 ± 5.7 | 10.4 ± 5.1 | 0.986 |
Experience of LP | Â | Â | Â |
   Yes | 14 (40%) | 11 (31.4%) |  |
   No | 21 (60%) | 24 (68.6%) | 0.509 |
Experience of PLPH | Â | Â | Â |
   Yes | 4 (23.5%) | 2 (20%) |  |
   No | 13 (76.5%) | 8 (80%) | 0.831 |
Physician | Â | Â | Â |
   Intern | 1 (3%) | 2 (6%) |  |
   First-year Resident | 33 (97%) | 28 (85%) | 0.138 |
   Second-year Resident | 0 | 3 (9%) |  |
LP attempts | Â | Â | Â |
   1 | 27 (77.1%) | 25 (71.5%) |  |
   2 | 4 (11.4%) | 5 (14.2%) |  |
   3 | 3 (8.6%) | 4 (11.4%) | 0.805 |
   4 | 1 (2.9%) | 0 |  |
   7 | 0 | 1 (2.9%) |  |
Leukocytosis in CSF (WBC > 5 mm3) | 7 (20%) | 7 (20%) | 1.000 |
Treatment using analgesics after PLPH | Â | Â | Â |
   No use | 4 (40%) | 7 (58.3%) |  |
   Non-opioids added | 2 (20%) | 1 (8.3%) | 0.613 |
   Non-opioids maintained | 4 (40%) | 4 (33.3%) |  |