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An approach to estimate between-and within-group correlation coefficients in multicenter studies : Plasma carotenoids as biomarkers of intake of fruits and vegetables.

Pietro FERRARI ; Wael-K AL-DELAIMY ; Heiner BOEING ; Hendriek-C BOSHUIZEN ; Gerd JOHANSSON ; Philippos ORFANOS ; Kim OVERVAD ; Domenico PALLI ; Elio RIBOLI ; Andrew RODDAM ; Miguel RODRIGUEZ-BARRANCO ; Guri SKEIE ; Nadia SLIMANI ; Anne THIEBAUT ; International Agency for Research on Cancer (IARC) Unit of Nutrition and Cancer (Lyon, FRA) |

Dans American journal of epidemiology (vol. 162, n° 6, 2005)

[BDSP. Notice produite par INIST-CNRS 6Mb2R0xm. Diffusion soumise à autorisation]. In a multicenter study, the overall correlation between two variables can be broken down into a within-and a between-group correlation reflecting associations at [...]

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