Table 2
Prevalence of spinal pain under different case-definitions among 46,726 Danish children from the Danish National Birth Cohort, 11–14 years of age, born between 1996 and 2003, stratified by child’s sex (chi-squared tests of heterogeneity between boys and girls were statistically significant for all case-definitions) (N = 46,726)
aInverse probability weights relative to all children born in Denmark from 1996 to 2003
Case-definitions of spinal pain Original data (unweighted data) Weighted dataa Total
N (%)Boys
N (%)Girls
N (%)Total (%) Boys (%) Girls (%) Overall spinal painb No pain 27,256 (58.3) 13,667 (61.3) 13,589 (55.6) 57.3 60.1 54.7 Moderate pain 13,877 (29.7) 6446 (28.9) 7431 (30.4) 30.0 29.4 30.4 Severe pain 5593 (12.0) 2174 (9.8) 3419 (14.0) 12.8 10.4 14.9 Multiple spinal pain No pain 41,133 (88.0) 20,113 (90.2) 21,020 (86.0) 87.2 89.6 85.1 One-sited pain 4266 (9.1) 1705 (7.7) 2561 (10.5) 9.7 8.0 11.2 Multi-sited pain 1327 (2.9) 469 (2.1) 858 (3.5) 3.1 2.4 3.7 Spinal pain-related daily-life consequencesc Never 36,541 (78.2) 17,736 (79.6) 18,805 (77.0) 77.6 79.1 76.2 1–2 times 7561 (16.2) 3471 (15.6) 4090 (16.8) 16.4 15.8 17.0 More than 2 times 2613 (5.6) 1074 (4.8) 1539 (6.3) 6.0 5.0 6.9 Missing 11 (0.02) 6 (0.03) 5 (0.02) 0.02 0.03 0.02 bMain outcome of interest based on neck, middle back, and low back pain (see Fig. Fig.33)
cDefined as follows: “Never” if no experience of any of the daily-life consequences, “1–2 times” if they responded “once or twice” to only one of the daily-life consequences, and the remaining were categorized as “More than 2 times”