More and more countries are introducing different kinds of ethical rules to protect the integrity of their citizens. Many of those rules relate to the recording of personal data, and some of them apply to research activities. From an ESPAD perspective, ethical rules may, for example, entail a requirement to obtain the approval of an ethics committee or the consent of parents. According to Table B, the approval of an ethics committee was asked for and obtained in 13 countries in 2015.

The ESPAD guidelines emphasise that ESPAD surveys should be confidential and anonymous. It is also important for students to be informed that answering the questionnaire is voluntary. In addition, it is the responsibility of each research team to comply with all national laws, regulations and guidelines concerning research ethics. According to Table B, all countries stated that they followed their national ethical rules when collecting the data.

It was necessary to obtain some form of parental consent in roughly three quarters of the countries. Normally, passive consent was sufficient, but for three countries active parental consent was required. According to Table C, 0.5 % (0.0-1.5 %) of the students could not take part in the study due to parental refusal in countries where only passive consent was needed. In Georgia, Portugal and Romania active parental consent was demanded, which resulted in higher refusal rates. According to the standard instructions, the students are informed that the study is voluntary. On average, 0.5 % (0.0-1.5 %) of the students present in the classrooms refused to take part in the survey.

Table B. Ethical aspects. ESPAD 2015

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Country Ethical review needed Parental consent needed National ethical rules followed
Albania No No Yes
Austria No In some schools Yes
Belgium (Flanders) No In some schools Yes
Bulgaria No In some schools (active) Yes
Croatia Yes Yes, passive Yes
Cyprus Yes Yes, passive Yes
Czech Republic No No Yes
Denmark No No Yes
Estonia Yes Yes, passive Yes
Faroes No No Yes
Finland Yes Yes, passive Yes
FYR Macedonia a No No Yes
France Yes Yes, passive Yes
Georgia Yes Yes, active Yes
Greece Yes Yes, mainly passive Yes
Hungary No In some schools Yes
Iceland No Yes, passive Yes
Ireland Yes Yes, passive Yes
Italy Yes Yes, passive Yes
Latvia Yes Yes, passive Yes
Liechtenstein No Yes, passive Yes
Lithuania No In a third of the schools (passive) Yes
Malta No No Yes
Moldova No No Yes
Monaco No Yes, passive Yes
Montenegro No Yes, passive Yes
Netherlands No Yes, passive Yes
Norway No Yes, passive Yes
Poland No In some schools Yes
Portugal Yes Yes, active Yes
Romania Yes Yes, active Yes
Slovakia No In some schools Yes
Slovenia No In some schools (active) Yes
Sweden No No Yes
Ukraine Yes No Yes

a Official name former Yugoslav Republic of Macedonia.

Table C. Refusals, discarded questionnaires and number of valid questionnaires. Students born in 1999. ESPAD 2015

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Country Refusals a Discarded questionnaires (%)  Reduction of invalid due to discarding (%) Reduction in ‘relevin’ due to discarding (%) Valid questionnaires (n)
Parental refusal (%) Student refusal (%) Boys Girls All
Albania . 0,0 2,2 . 18,2 1.217 1.336 2.553
Austria c 0,3 0,4 4,2 . 46,0 1.756 1.928 3.684
Belgium (Flanders)  0,1 0,0 2,3 100,0 0,0 918 853 1.771
Bulgaria 1,5 1,0 2,1 100,0 28,8 1.453 1.469 2.922
Croatia 1,7 0,0 2,3 71,4 49,0 1.337 1.221 2.558
Cyprus .. .. 3,8 . 43,9 1.008 1.090 2.098
Czech Republic . 0,1 2,3 . 34,7 1.278 1.460 2.738
Denmark 0,0 0,2 1,3 . 55,0 796 874 1.670
Estonia 0,7 0,5 0,5 . 28,2 1.224 1.228 2.452
Faroes . 0,0 0,2 . 0,0 257 254 511
Finland 0,5 0,5 0,7 60,0 39,6 1.958 2.091 4.049
FYR Macedonia d 0,0 0,0 3,0 58,3 32,0 1.179 1.249 2.428
France c 0,6 0,5 0,9 . 27,6 1.334 1.380 2.714
Georgia 2,0 0,1 1,1 100,0 21,4 1.047 919 1.966
Greece 1,4 0,6 0,5 40,0 42,6 1.576 1.626 3.202
Hungary 0,3 0,4 0,8 15,4 34,4 1.372 1.363 2.735
Iceland 0,1 0,8 0,9 . 40,5 1.312 1.351 2.663
Ireland 0,0 1,2 1,5 66,7 45,5 749 721 1.470
Italy 0,1 0,2 2,6 92,9 39,8 2.093 1.966 4.059
Latvia 1,4 1,3 7,6 . 59,5 558 561 1.119
Liechtenstein 0,0 0,9 0,0 . 0,0 143 173 316
Lithuania 0,7 0,4 0,6 0,0 31,6 1.303 1.270 2.573
Malta . 0,0 0,8 14,3 34,4 1.665 1.661 3.326
Moldova . 0,2 1,6 100,0 43,3 1.325 1.261 2.586
Monaco 0,1 0,0 1,7 . 61,8 202 195 397
Montenegro . 0,1 1,9 31,3 53,5 1.957 1.887 3.844
Netherlands 0,1 0,1 1,5 100,0 52,6 853 831 1.684
Norway 0,0 0,4 4,2 . 48,6 1.354 1.231 2.585
Poland 0,6 0,5 2,5 . 25,4 5.658 6.164 11.822
Portugal 6,0 1,2 1,0 0,0 18,2 1.568 1.888 3.456
Romania 6,9 1,1 0,5 66,7 24,8 1.711 1.789 3.500
Slovakia 0,2 0,0 0,7 . 43,4 1.108 1.100 2.208
Slovenia 0,8 1,2 0,7 25,0 23,0 1.675 1.809 3.484
Sweden b . 1,5 3,0 . 50,8 1.265 1.289 2.554
Ukraine . 0,1 0,6 . 35,4 1.126 1.223 2.349
AVERAGE (%)/TOTAL (n) 1,0 0,5 1,8 57,9 35,2 47.335 48.711 96.046
a Regardless of birth year. Percentages calculated from classroom reports.
b Sweden included a third option to the question on gender (not able to specify gender belonging). Discarded questionnaires also includes students stating this option.
c Reduction in ‘relevin’: results for Austria and France refer to all students born in 1999, not only the ESPAD sample since further cases are removed when new weightings are introduced in the final data.
d Official name former Yugoslav Republic of Macedonia.