Average FOBT Hb content was higher for cancers located in the left ( N =135) as compared with right colon ( N =50, data missing in six cases), but the difference did not reach statistical significance (816.3 vs 769.0 ng ml −1 , P =0.98, t =0.01, df=183).
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Association of FOBT-assessed faecal Hb content with colonic lesions detected in the Florence screening programme.
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0.9800
0.9800