Table 1 Age, sex and type of school for the children participating by study year
From: Spinal pain in Danish school children – how often and how long? The CHAMPS Study-DK
Study year 1 (2011–2012) (N = 1015) | Study year 2 (2012–2013) (N = 1179) | Study year 3 (2013–2014) (N = 1077) | ||||
|---|---|---|---|---|---|---|
Number of children | % girls | Number of children | % girls | Number of children | % girls | |
Age 8 | 50 | 54% | − | − | − | |
Age 9 | 197 | 61% | 69 | 55% | − | |
Age 10 | 213 | 50% | 236 | 58% | 68 | 57% |
Age 11 | 224 | 50% | 271 | 51% | 233 | 59% |
Age 12 | 225 | 52% | 270 | 47% | 244 | 52% |
Age 13 | 103 | 49% | 218 | 57% | 226 | 45% |
Age 14 | 3 | 33% | 112 | 47% | 199 | 53% |
Age 15 | − | − | 3 | 33% | 106 | 48% |
Age 16 | − | − | − | − | 1 | 0% |
I-school/c-schoola | 602/413 | 56%/47% | 800/518 | 56%/47% | 767/440 | 55%/48% |