This cross sectional study developed and validated a LBP risk-factor screening scale for
use with sugarcane farmers. The scale was developed from a synthesis of LBP risk factors,
pretested with 30 sugarcane farmers and administered to five hundred and forty sugarcane
farmers to test its psychometric properties. Results indicated construct validity for
three factors; physical factors (19 items) with factor loadings of 0.406 to 0.881 and
communalities between 0.471 and 0.991; psychological factors (7 items) with factor
loadings of 0.635 to 0.821 and communalities between 0.444 and 0.714, and third, working
environment factors (2 items), with factor loadings between 0.345 and 0.347 and
communalities between 0.946 and 0.953. The content validity index was 0.90 with
reliability index of 0.87. Sensitivity, specificity, positive predictive value, negative
predictive value and accuracy were 82.02%, 30.49%, 62.65% and 54.40% respectively. The
area under the receiver operating characteristic was 0.56. The scale’s high specificity
and sensitivity and comprehensive three risk-factor dimensions should make it a very
useful screening tool in primary health care for early detection of LBP and for LBP
risk-reduction and prevention advice. Future studies could focus on confirming content and
predictive validity in other settings to assess generality of its usage.