1 = male
2 = female

0 = grade 9
1 = grade 10
2 = grade 11
3 = grade 12

1 = private school
2 = government school

owner of the phone
1 = mine
2 = my father's phone
3 = my mothres phone
4 = my sibilings phone
5 = other

place of using smartphone most of the time
1 = at home
2 = at school
3 = both at home and school
4 = other area

use spartphone for Accessing Educational Apps
1 = yes
2 = no

1 = wifi at home
2 = wifi other than home
3 = mobile data
4 = wifi at home, other than home and data
5 = wifi at home & mobile data
6 = other

preferebale time to use smartphone
1 = in the morning
2 = in the mid day
3 = afternoon
4 = at night
5 = the whole day
6 = in the morning, afternoon & night
7 = in the morning and night
8 = in the afternoon and night
9 = whole day and night
10 = other

1 = strongly disagree
2 = disagree
3 = slightley disagree
4 = slightly agree
5 = agree
6 = strongly agree

1a I was aware of dryness of my mouth
0 = Did not apply to me at all
1 = Applied to me to some degree
2 = Applied to me to a considerable degree
3 = Applied to me very much or most of the time

Problematic Smartphone use final
0 = no
1 = yes

0 = normal
1 = mild anxiety
2 = moderate anxiety
3 = severe anxiety
4 = extremely severe anxiety

0 = no anxiety
1 = anxiety

depression categorized
0 = normal
1 = mild depression
2 = moderate depression
3 = severe depression
4 = extremely severe depression

depression dichotomous
0 = no depression
1 = depression

age categorized
0 = less than 18 years
1 = 18 years and above

0 = none
1 = 1-2 brothers
2 = 3 or more

numbers of sisters
0 = none
1 = 1-2 sisters
2 = 3 or more

total duration of smartphone use 1
0 = ≤4 years
1 = >4 years

numbres days using samartphone
0 = ≤3 days
1 = 4-6 days
2 = 7 days

0 = male
1 = female

0 = government school
1 = private school

1 = whole day
2 = moring, midday & afternoon
3 = other times

0 = female
1 = male