(10) How is your posture? (bending forward, stoop, constant looking down) | 1. Good 2. Bad 3. Can’t say | 1. Good 2. Bad 3. Can’t say |
(11) Do you have stiff neck, stiff back or stiff shoulder? | 1. Severe 2. To some extent 3. A little 4. None | 1. Severe 2. To some extent 3. A little 4. None |
(12) Did you spend more time sitting or sleeping after having smartphone? |
| 1. Yes 2. No 3. Can’t say |
(13) How long do you spend in your room on holidays? | 1. Most of the time 2. Long hours 3. A few hours 4. A little time | 1. Most of the time 2. Long hours 3. A few hours 4. A little time |
(14) Did you ever notice your physical fitness become worse after having smartphone? |
| 1. Very 2. To some extent 3. A little 4. None |
III. About sleep | ||
(15) Time spent using smartphones before actual sleeping? *Please fill in the “before having smartphone” for conventional mobile phone use | 1. <30 min 2. 30 min ~ 1 hr 3. 1 ~ 2 hrs 4. 2 ~ 4 hrs 5. >5 hrs | 1. <30 min 2. 30 min ~ 1 hr 3. 1 ~ 2 hrs 4. 2 ~ 4 hrs 5. >5 hrs |
(16) When is your bedtime? | 1. Before 22 o’clock 2. 22 ~ 24 o’clock 3. 24 ~ 2 o’clock 4. 2 ~ 4 o’clock 5. After 4 o’clock | 1. Before 22 o’clock 2. 22 ~ 24 o’clock 3. 24 ~ 2 o’clock 4. 2 ~ 4 o’clock 5. After 4 o’clock |
(17) How many hours do you sleep a day? | 1. <5 hrs 2. 5 ~ 6hrs 3. 6 ~ 7hrs 4. 7 ~ 8hrs 5. >8 hrs | 1. <5 hrs 2. 5 ~ 6 hrs 3. 6 ~ 7 hrs 4. 7 ~ 8 hrs 5. >8 hrs |
(18) Do you have feeling of sufficient sleep every day? | 1. Yes 2. No 3. Can’t say | 1. Yes 2. No 3. Can’t say |
(19) Do you have problems with sleep as specified on the right? (Multiple answers allowed) | 1. I can’t sleep well 2. Superficial sleep 3. I wake up many times at night 4. Short sleep time 5. Still tired even after sleep 6. No problem | 1. I can’t sleep well 2. Superficial sleep 3. I wake up many times at night 4. Short sleep time 5. Still tired even after sleep 6. No problem |