Table 1.
Frequency of participation by unique municipalities in Ungdata surveys.
| Total sample, N = 628,678 | Included sample, N = 566,912 | ||||
|---|---|---|---|---|---|
| Survey responses N (%) | Municipalities N (%)a | Survey responses N (%) | Municipalities N (%)a | Participation in T1, T2, and T3 N | |
| Once | 7,109 (1.1) | 41 (9.6) | 5,834 (1.0) | 26 (6.1) | 0 |
| Twice | 122,640 (19.6) | 151 (35.3) | 109,497 (19.4) | 116 (27.1) | 0 |
| Three times | 332,908 (53.1) | 151 (35.3) | 303,523 (53.7) | 133 (31.1) | 176,579d |
| Four times | 153,512 (24.5) | 64 (15.0) | 136,543 (24.1) | 62 (14.5) | 125,284 |
| Five times | 10,687 (1.7) | 3 (0.7) | 9,911 (1.8) | 3 (0.7) | 9,911 |
| Total | 626,856 (100.0)b | 410 (95.8) | 565,308 (100.0)c | 340 (79.4) | 311,774e |
The percentage is relative to the total number of municipalities in Norway (i.e., n = 428).
Omitting eight municipality codes that only included county code and could therefore not be identified as a specific municipality, representing n = 1,822 of the survey responses (0.3% of total). See Appendix 1 in Supplementary Material.
Omitting seven municipality codes that only included county code and could therefore not be identified as a specific municipality, representing n = 1,604 of the survey responses (0.3% of total).
These survey responses (n = 176,579) are used in sensitivity analyses as subsample II (Figure 7).
These survey responses (n = 311,774) are used in sensitivity analyses as subsample I (Figure 7).