Table 3.
Fearful Isolated Sleep Paralysis Hallucinatory Content—Percentage Endorsing Symptoms and Distress/Severity Means (Standard Deviation)
| ISP Hallucination | Fearful ISP episode
|
Recurrent fearful ISP
|
||
|---|---|---|---|---|
| % | M (SD) | % | M (SD) | |
| Try to speak or call out, but can’t | 61.5 | 4.31 (3.73) | 52.9 | 3.88 (3.90) |
| Pressure on chest/smothering | 57.7 | 3.58 (3.37) | 52.9 | 3.35 (3.48) |
| Feel that body has moved | 38.5 | 2.08 (2.88) | 52.9 | 3.00 (3.14) |
| Hear unusual sounds | 38.5 | 2.23 (3.02) | 35.3 | 2.12 (3.00) |
| Numbness/vibrating/tingling sensations | 46.2 | 2.50 (3.02) | 52.9 | 2.71 (2.85) |
| Leave or see body from outside | 30.8 | 1.69 (2.78) | 41.2 | 2.12 (2.83) |
| Feel a presence in the room | 50.0 | 2.81 (3.29) | 47.1 | 2.76 (3.31) |
| See something in room | 34.6 | 1.96 (2.99) | 47.1 | 2.53 (3.06) |
| Falling/flying/floating/spinning | 34.6 | 1.81 (2.71) | 35.3 | 1.94 (2.90) |
| Feel like might die | 57.7 | 3.73 (3.61) | 52.9 | 3.12 (3.50) |
| Feel pain | 19.2 | 0.85 (1.91) | 29.4 | 1.29 (2.26) |
| Feel cold | 23.1 | 1.08 (2.37) | 29.4 | 1.47 (2.79) |
| Feel erotic feelings | 19.2 | 0.69 (1.67) | 23.5 | 0.65 (1.27) |
| Feel like being strangled | 19.2 | 1.04 (2.24) | 17.6 | 0.88 (2.06) |
| Feel like being touched | 23.1 | 1.38 (2.74) | 23.5 | 1.35 (2.76) |
Note: Those participants meeting ISP criteria only were not assessed due to the presence of cut-out questions contained in the measure. ISP = Isolated sleep paralysis; N for fearful ISP lifetime episode = 27; N for recurrent fearful ISP = 17.