Table 1

Characteristics of the 176 respondents to survey of phantom vibration syndrome

CharacteristicNo (%) of respondentsP value of comparison†
Total (% of column)With phantom vibrations (% of row)*
Age (years):169 (100)†
20–2956 (33)45 (80)<0.001‡
30–3965 (38)46 (71)
40–4930 (18)18 (60)
50–5913 (8)3 (23)
60–695 (3)3 (60)
Sex:175 (100)
Men68 (39)47/65 (72)0.40
Women107 (61)68/104 (65)
Occupation:163 (100)
Attending physician45 (28)23 (51)0.001
Resident physician67 (41)52/65 (80)
Medical student23 (14)19/21 (90)
Nurse17 (10)8 (47)
Nurse practitioner4 (2)3 (75)
Medical assistant7 (4)4 (57)
Device carried:172 (100)
Pager148 (86)99/145 (68)0.99
Cell phone141 (82)96/139 (69)0.53
Device location:172 (100)
Belt68 (40)46/66 (70)0.015
Side pocket73 (42)52 (71)
Breast pocket8 (5)8 (100)
Back pocket4 (2)2 (50)
Other19 (11)7/18 (39)
Use device in vibrate mode:172 (100)
Never19 (11)6/17 (35)<0.001‡
Intermittently55 (32)28 (51)
Most of the time52 (30)45 (87)
Always46 (27)36/45 (80)
Hours per day:169 (100)
<63 (2)00.004‡
6–12106 (63)66/105 (63)
>1260 (36)48 (80)
Mean No of pages per hour:168 (100)
<593 (55)59/92 (64)0.16‡
5–1063 (38)45 (71)
11–156 (4)5 (83)
>156 (4)5 (83)
Maximum No of pages per hour:169 (100)
<547 (28)28 (60)0.32‡
5–1045 (27)32 (71)
11–1535 (21)26 (74)
>1542 (25)28/41 (68)

*Numbers adjusted for those who did not answer both the question about phantom vibrations and about the particular characteristic.

†Comparisons made with Fisher’s exact test unless stated otherwise.

‡Non-parametric test for trend.