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Table 1 Lifetime, one week, and point prevalence of neck, mid back, and low back pain at age 11–13 and two years later

From: Spinal pain in adolescents: prevalence, incidence, and course: a school-based two-year prospective cohort study in 1,300 Danes aged 11–13

  11-13 yr. (n = 1291) 13-15 yr. (n = 1064)
   Girls (n = 625) Boys (n = 666) Girls (n = 499) Boys (n = 565)
   n (mis) % 95% CI n (mis) % 95% CI n (mis) % 95% CI n (mis) % 95% CI
Lifetime prevalence NP 491 78.6 75.3, 81.2 490 73.6 70.2, 76.9 408 81.8 78.4, 85.2 410 72.6 68.9, 76.2
  MBP 382 61.1 57.3, 64.9 387 (1) 58.2 54.4, 61.9 339 67.9 63.8, 72.0 336 (1) 59.6 55.5, 63.6
  LBP 302 (2) 48.5 44.6, 52.4 271 (1) 40.8 37.0, 44.5 293 (1) 58.8 54.5, 63.2 258 (1) 45.7 41.6, 49.9
One week prevalence NP 149 23.8 20.5, 27.2 150 22.5 19.3, 25.7 164 32.9 28.7, 37.0 151 (2) 26.8 23.2, 30.5
  MBP 105 (1) 16.8 13.9, 19.8 132 (1) 19.8 16.8, 22.9 144 (3) 29.0 25.0, 33.0 136 (3) 24.2 20.7, 27.7
  LBP 82 (2) 13.2 10.5, 15.8 66 (1) 9.9 7.7, 12.2 108 (2) 21.7 18.1, 25.4 103 (5) 18.4 15.2, 21.6
Point prevalence NP 68 (1) 10.9 8.5, 13.3 70 (2) 10.5 8.2, 12.9 81 (3) 16.3 13.1, 19.6 66 (4) 11.8 9.1, 14.4
  MBP 42 6.7 4.8, 8.7 62 (1) 9.3 7.1, 11.5 47 (2) 9.5 6.9, 12.0 52 (3) 9.3 6.9, 11.6
  LBP 31 (2) 5.0 3.3, 6.7 28 (1) 4.2 2.7, 5.7 40 (3) 8.1 5.7, 10.5 33 (6) 5.9 3.9, 7.9
  1. CI = Confidence intervals; LBP = Low back pain; MBP = Mid back pain; Mis = Missing values; NP = Neck pain.