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Table 2 Implementation of the X:IT intervention at the first and second follow-up by program components: smoke-free school grounds, curriculum, and parental involvement

From: High impact of implementation on school-based smoking prevention: the X:IT study—a cluster-randomized smoking prevention trial

Fidelity measures Adherence Dose Quality of delivery Participant responsiveness
Intervention component
Smoke-free school grounds
Answered by pupils   See pupils smoke daily or sometimes   Pupils should be allowed to smoke at school grounds
   Inside at school Outside at school grounds Outside school grounds   
First follow-up (2202 pupils) 237 pupils (11.6 %) 1253 pupils (60.9 %) 1558 pupils (75.1 %) 261 pupils (13.2 %)
Second follow-up (1748 pupils) 287 pupils (17.4 %) 953 pupils (57.2 %) 1242 pupils (74.5 %) 230 pupils (15.9 %)
   See teachers smoke daily or sometimes   Teachers should be allowed to smoke at school grounds
   Inside at school Outside at school grounds Outside school grounds   
First follow-up     601 pupils (29.4 %) 896 pupils (42.8 %) 998 pupils (48.3 %)     286 pupils (14.5 %)
Second follow-up     428 pupils (25.1 %) 731 pupils (43.6 %) 915 pupils (54.7 %)     237 pupils (16.5 %)
Answered by school coordinators Total smoking prohibition pupils   Teachers control pupils smoking daily or often  
First follow-up (50 schools) 29 schools (59.0 %)    
Second follow-up (39 schools) 24 schools (66.7 %)    
  Total prohibition teachers Allowed if invisible Allowed   Inside at school Outside at school Outside school grounds  
First follow-up 8 schools (16.0 %) 38 schools (76.0 %) 4 schools (8.0 %)   36 schools (75.0 %) 37 schools (77.0 %) 24 schools (50.0 %)  
Second follow-up 9 schools (25.0 %) 24 schools (66.7 %) 3 schools (8.3 %)   30 schools (81.1 %) 32 schools (86.5 %) 23 schools (62.2 %)  
Smoke-free curriculum
Answered by pupils   Number of classes where at least half of pupils remember having 7 to 9 or more lessons   Liked the teaching
First follow-up (2202 pupils in 121 classes)   26 classes (21.5 %)   1794 pupils (82.3 %)
Second follow-up (1748 pupils in 100 classes)   8 classes (8.0 %)   1340 pupils (77.6 %)
Answered by school coordinators Mandatory 8 lessons or more   Material worked well  
First follow-up (50 schools, 121 classes) 93 classes (80.2 %)   28 schools (60.9 %)  
Second follow-up (39 schools, 100 classes) 58 classes (65.9 %)   17 schools (47.2 %)  
Parental involvement
Answered by pupils Smoke-free contract Smoke-free dialogue   Parents positive towards smoke-free contracts Parents expressed their opinion on the smoke free dialogue  
First follow-up (2202 pupils in 121 classes) 1818 pupils (83.2 %) 1652 pupils (79.0 %)   1442 pupils (68.7 %) 1437 pupils (70.5 %)  
Second follow-up (1748 pupils in 100 classes) 1249 pupils (73.9 %) 1300 pupils (78.7 %)   1126 pupils (66.7 %) 1129 pupils (70.7 %)  
Answered by school coordinators X:IT presented for parents  
First follow-up (121 classes) 111classes (94.9 %)
Second follow-up (100 classes) 84 classes (88.4 %)
  1. Numbers are percentages of item responses