Table 2.
Missing data points imputed and descriptive statistics for THRESHOLD and SLOPE by site and pain type
| Stimulus Response Seriesa | SLOPEb Mean (SD) | THRESHOLDc Mean (SD) | Missing data per seriesd |
|---|---|---|---|
| Glabrous skin (palm), 1st pain | 5.6 (3.3) | 43.1°C (2.7) | n=38 (13%) |
| Glabrous skin (palm), 2nd pain | 5.2 (3.3) | 43.9°C (2.5) | n=51 (17%) |
| Hairy skin (forearm), 1st pain | 6.9 (2.6) | 42.2°C (2.6) | n=35 (12%) |
| Hairy skin (forearm), 2nd pain | 6.7 (3.2) | 42.9°C (2.1) | n=42 (14%) |
a
A series is defined as defined as a set of seven consecutive temperatures (e.g., 45° C, 46° C 47° C, 48° C, 49° C, 50° C etc.).
b
The variable SLOPE represents the change in pain rating (0-100 scale) for each change in temperature of 1°C.
c
The THRESHOLD variable was determined individually for each subject, by a curve fitting procedure and represents the temperature in degrees C where the curve passes through the 0 on the Y axis (i.e., pain rating).
d
The number of data points out of 300 per series that were imputed for subjects terminating before 51° C.