Table 2.  Odds ratios for pain at least weekly in 14-18 year old Finns Adolescent health and lifestyle survey School health promotion survey* School health promotion survey* 1991 1999 2001 1996 1998 2000 1997 1999 2001 Neck-shoulder pain:   Girls 1 1.63 (1.48 to 1.80) 1.72 (1.56 to 1.91) 1 1.31 (1.25 to 1.38) 1.50 (1.43 to 1.58) 1 1.23 (1.17 to 1.29) 1.36 (1.29 to 1.43)   Boys 1 1.42 (1.22 to 1.66) 1.70 (1.46 to 1.99) 1 1.23 (1.15 to 1.31) 1.63 (1.53 to 1.74) 1 1.29 (1.21 to 1.37) 1.42 (1.33 to 1.51) Lower back pain:   Girls 1 1.26 (1.09 to 1.46) 1.50 (1.30 to 1.75) 1 1.14 (1.06 to 1.24) 1.47 (1.37 to 1.59) 1 1.19 (1.11 to 1.29) 1.44 (1.34 to 1.55)   Boys 1 1.08 (0.91 to 1.28) 1.23 (1.03 to 1.47) 1 1.24 (1.14 to 1.34) 1.50 (1.38 to 1.62) 1 1.27 (1.18 to 1.36) 1.36 (1.26 to 1.47) * Carried out in Helsinki, southwestern Finland, eastern Finland, central Finland, and Lapland in 1996, 1998, and 2000 and western Finland in 1997, 1999, and 2001. P<0.05.