Variable	Question	Measurement Level	Scale Values
Age	Q1_1	Scale	numeric
Sex	Q1_2	Nominal	Male/Female
Location	Q2_1	Nominal	string
Environment	Q2_2	Nominal	Rural/Urban
Education level	Q3	Nominal	1 to 6
Profession	Q4	Nominal	string
Current occupation	Q5	Nominal	string
Exposure to environmental factors	Q6_1	Nominal	Yes/No
Exposure to environmental factors (physical/chemical)	Q6_2	Nominal	0 to 2
Exposure to environmental factors (duration in years)	Q6_3	Scale	numeric
Gum bleeding	Q7_1	Nominal	Yes/No
Gum bleeding type	Q7_2	Nominal	string
Smoking—cigarettes per day	Q8	Ordinal	numeric
Did you smoke in the past	Q9	Nominal	Yes/No
General health issues—diabetes	Q10_1	Nominal	Yes/No
General health issues—allergies	Q10_2	Nominal	Yes/No
General health issues—cardiovascular	Q10_3	Nominal	Yes/No
General health issues—gastric	Q10_4	Nominal	Yes/No
General health issues—renal	Q10_5	Nominal	Yes/No
General health issues—arthritis	Q10_6	Nominal	Yes/No
General health issues—osteoporosis	Q10_7	Nominal	Yes/No
General health issues—lung diseases	Q10_8	Nominal	Yes/No
General health issues—depression	Q10_9	Nominal	Yes/No
General health issues—other	Q10_10	Nominal	string
Normal blood sugar	Q11	Nominal	Yes/No/I don’t know
Normal cholesterol	Q12	Nominal	Yes/No/I don’t know
Use of medication	Q13_1	Nominal	Yes/No
Use of medication—what medication	Q13_2	Nominal	string
Frequency of dentist visits	Q14	Ordinal	1 to 4
Dental plaque present	Q15	Nominal	Yes/No
Plaque coloring	Q16	Nominal	Yes/No
Dental mobility	Q17_0	Nominal	Yes/No
Dental mobility—absent	Q17_1	Nominal	Yes/No
Dental mobility—medium	Q17_2	Nominal	Yes/No
Dental mobility—advanced	Q17_3	Nominal	Yes/No
Dental mobility—localized	Q17_4	Nominal	Yes/No
Dental mobility—general	Q17_5	Nominal	Yes/No
Age of diagnosis for dental mobility	Q18	Scale	numeric
Gum diseases in family members	Q19	Nominal	Yes/No/I don’t know
Age of diagnosis for paradental disease	Q20	Ordinal	0 to 5
Frequency of gum bleeds	Q21	Ordinal	1 to 3
Dental retractions	Q22	Nominal	Yes/No
Cause of dental retractions	Q23	Nominal	4 categories
Orthodontic treatment	Q24	Nominal	Yes/No
Dental hygiene—dental floss	Q25_1	Nominal	Yes/No
Dental hygiene—manual brushing	Q25_2	Nominal	Yes/No
Dental hygiene—mechanical brushing	Q25_3	Nominal	Yes/No
Dental hygiene—Superfloss	Q25_4	Nominal	Yes/No
Dental hygiene—interdental brushing	Q25_5	Nominal	Yes/No
Dental hygiene—oral douch	Q25_6	Nominal	Yes/No
Dental hygiene—-other	Q25_7	Nominal	string
Time spent on hygiene	Q26	Ordinal	1 to 6
Frequency of dental floss	Q27	Ordinal	1 to 5
Frequency of mouthwash (last 7 days)	Q28	Ordinal	0 to 4
Frequency of other methods of hygiene (last 7 days)	Q29	Ordinal	0 to 4
Think you have gum problems	Q30	Nominal	Yes/No/I don’t know
Gingivitis treatment	Q31	Nominal	Yes/No/I don’t know
Eating habits	Q32	Nominal	4 categories
Where do you eat	Q33	Nominal	3 categories
Eat regularly	Q34	Nominal	Yes/No
Daily menu composition	Q35	Nominal	2 categories
Amount of water per day	Q36	Ordinal	1 to 5
Preferred diet	Q37	Nominal	2 categories
Are you stressed	Q38_1	Nominal	Yes/No/I don’t know
Stress sources—family	Q38_2	Nominal	Yes/No
Stress sources—work	Q38_3	Nominal	Yes/No
Stress sources—don’t know	Q38_4	Nominal	Yes/No
Stress sources—other	Q38_5	Nominal	Yes/No
Dental extractions	Q39	Ordinal	1 to 5
Happy with how teeth look	Q40	Ordinal	1 to 5
Bad breath	Q41	Nominal	Yes/No
Bad breath—noticed by other	Q42	Nominal	Yes/No/I don’t know
Chewing difficulties (last 6 months)	Q43_1	Ordinal	1 to 5
Speech difficulties (last 6 months)	Q43_2	Ordinal	1 to 5
Cleaning difficulties (last 6 months)	Q43_3	Ordinal	1 to 5
Sleep difficulties (last 6 months)	Q43_4	Ordinal	1 to 5
Smiling difficulties (last 6 months)	Q43_5	Ordinal	1 to 5
Weight	Q44_1	Scale	numeric
Height	Q44_2	Scale	numeric
Frequency of drinking alcohol	Q45	Ordinal	1 to 5
How many standard drinks per day	Q46	Ordinal	1 to 5
How often you drink 6 standard drinks once	Q47	Ordinal	1 to 5
Lost interest in common activities	Q48	Nominal	Yes/No
Feeling of sadness	Q49	Nominal	Yes/No
Do you practice sports?	Q50	Nominal	Yes/No
Pronunciation difficulties (last 7 days)	Q51_1	Ordinal	1 to 5
Taste difficulties (last 7 days)	Q51_2	Ordinal	1 to 5
Life dissatisfaction (last 7 days)	Q51_3	Ordinal	1 to 5
Relaxation difficulties (last 7 days)	Q51_4	Ordinal	1 to 5
More tension due to problems in last 7 days	Q51_5	Ordinal	1 to 5
Interrupt meals due to problems in last 7 days	Q51_6	Ordinal	1 to 5
Unpleasant when eating due to problems in last 7 days	Q51_7	Ordinal	1 to 5
Annoyance due to problems in last 7 days	Q51_8	Ordinal	1 to 5
Difficulty in fulfilling daily tasks due to problems in last 7 days	Q51_9	Ordinal	1 to 5
Powerless due to problems in last 7 days	Q51_10	Ordinal	1 to 5
Shame due to problems in last 7 days	Q51_11	Ordinal	1 to 5
Unsatisfactory diet due to problems in last 7 days	Q51_12	Ordinal	1 to 5
Pain in the mouth area in the last 7 days	Q51_13	Ordinal	1 to 5
Feeling unsafe regarding teeth	Q51_14	Ordinal	1 to 5
Are you satisfied with the health of your teeth?	Q52	Ordinal	1 to 5
Detachable prosthetics	Q53	Nominal	3 categories
Do dental problems affect your life quality?	Q54_1	Nominal	Yes/No
Do dental problems affect your life quality?—How much?	Q54_2	Ordinal	1 to 5
Mouth dryness	Q55	Nominal	Yes/No
Bad habits	Q56	Nominal	6 categories
Feeling of bad breath	Q57	Nominal	Yes/No
Bad breath—noticed by other	Q58	Nominal	Yes/No
Minimum amount to pay for an app	Q59	Ordinal	1 to 6
Usefulness of an app	Q60	Ordinal	1 to 5
Maximum amount to pay for an app	Q61	Ordinal	1 to 6