# Table 1 Data from 90 calls using mobile phone videoconferencing for communication between volunteers and an emergency medical dispatch centre in a simulated medical emergency

Indoors (n = 30) Daylight (n = 30) Nighttime (n = 30) Total (n = 90) p value1
a: Demographics of the 90 volunteered participants.
Age, median (min, max) 32.5 (14, 78) 34.0 (15, 75) 28.0 (21, 66) 31.0 (14, 78) 0.8392
Female volunteers (n (%)) 8 (27) 13 (43) 12 (40) 33 (37) 0.366
Volunteers who has called an EMD center previously (n (%)) 12 (40) 13 (43) 12 (40) 37 (41) 0.955
Volunteers with college or university degree (n (%)) 18 (60) 18 (60) 21 (70) 57 (63) 0.042*
b: Number of elements correctly registered by EMD operator. When calculating p value the top three alternatives where combined.
No elements (n (%)) 0 (0) 0 (0) 0 (0) 0 (0) 0.065
One element (n (%)) 5 (17) 0 (0) 3 (10) 8 (9)
Two elements (n (%)) 11 (37) 8 (27) 6 (20) 25 (28)
Three elements (n (%)) 14 (46) 22 (73) 21 (70) 57 (63)
c: Sound quality as scored by EMD operator. When calculating p value the top four alternatives where combined.
Incomprehensible (n (%)) 0 (0) 0 (0) 0 (0) 0 (0) 0.153
Very difficult to understand (n (%)) 0 (0) 1 (3) 0 (0) 1 (1)
Somewhat difficult to understand (n (%)) 0 (0) 0 (0) 2 (7) 2 (2)
Fairly easy to understand (n (%)) 3 (10) 5 (17) 7 (23) 15 (17)
Very easy to understand (n (%)) 27 (90) 24 (80) 21 (70) 72 (80)
d: Video quality as scored by EMD operator. When calculating p value the top two alternatives where combined.
Not able to see instructions executed (n (%)) 0 (0) 1 (3) 1 (3) 2 (2) <0.001*
Low (n (%)) 0 (0) 1 (3) 8 (27) 9 (10)
Pretty low (n (%)) 0 (0) 3 (10) 13 (43) 16 (18)
Pretty good (n (%)) 11 (37) 7 (23) 8 (27) 26 (29)
Good (n (%)) 19 (63) 18 (60) 0 (0) 37 (41)
1. Three different locations were used as the emergency site in order to study the influence of light and noise on the video call: indoors with good light conditions and moderate background noise, outdoors in daylight with background traffic noise, and outdoors at nighttime with poor light conditions and very little background noise.
2. 1Chi-square test was used for calculating p value, except regarding Age.
3. 2For Age, Kruskal-Wallis test was used for calculating p value.
4. *Significant on a 5% level.