Prevalence of Low Back Pain among Primary School Students from the City of Valencia (Spain).

It is well-known that low back pain (LBP) prevalence is high among school-age children. However, literature concerning the initial onset of back pain between the ages of three and eleven years is scarce. The present study aims to analyze the prevalence of LBP in kindergarten and primary school students. A total of 278 (9.9 ± 2.1 years old; 52.2% girls) students from two public kindergartens and primary schools in Valencia (Spain) participated in this cross-sectional study. The Nordic questionnaire on LBP was used to assess the onset and duration of LBP symptoms. The lifetime prevalence of LBP was 47.5% ( = 132), the last year's prevalence was 44.2% ( = 123), and last week's prevalence was 18.8% ( = 50). Boys and girls reported a lifetime prevalence of 52.3% ( = 64) and 47.7% ( = 63) ( = 0.186, Fisher's exact test, 2-sided), respectively. By age group, lifetime episodes of LBP became more prevalent with increasing age ( < 0.001, Fisher's exact test, 2-sided). In summary, our findings show that LBP increases with age and further strengthens the evidence that LBP onset could start as young as 10 years of age.