|
| Before using smartphones | After starting to use smartphones | P value | ||
Eyestrain | no | 78 | (30.0) | 14 | (5.4) | <0.001 |
a little | 109 | (41.9) | 80 | (30.8) |
| |
to some extent | 56 | (21.5) | 108 | (41.5) |
| |
severe | 5 | (1.9) | 45 | (17.3) |
| |
missing | 12 | (4.6) | 13 | (5.0) |
| |
Posture | cannot say | 87 | (33.5) | 63 | (24.2) | 0.002 |
good | 26 | (10.0) | 14 | (5.4) |
| |
bad | 137 | (52.7) | 177 | (68.1) |
| |
missing | 10 | (3.8) | 6 | (2.3) |
| |
Stiffness of the neck, back and shoulders | no | 57 | (21.9) | 29 | (11.2) | <0.001 |
a little | 80 | (30.8) | 56 | (21.5) |
| |
to some extent | 78 | (30.0) | 78 | (42.7) |
| |
severe | 35 | (13.5) | 59 | (22.7) |
| |
missing | 10 | (3.8) | 5 | (1.9) |
| |
Level of activity on a holiday | no | 41 | (15.8) | 32 | (12.3) | <0.001 |
a little | 68 | (26.2) | 63 | (24.2) |
| |
to some extent | 91 | (35.0) | 101 | (38.8) |
| |
quite | 44 | (16.9) | 54 | (20.8) |
| |
missing | 16 | (6.1) | 10 | (3.8) |
| |
Constipation | no | 131 | (50.4) | 125 | (48.1) | ns |
a little | 60 | (23.1) | 66 | (25.4) |
| |
moderate | 40 | (15.4) | 46 | (17.7) |
| |
severe | 14 | (5.4) | 15 | (5.8) |
| |
missing | 15 | (5.8) | 8 | (3.1) |
|