Figure 2.

NBI question #27 "I drink more than 3 cups of coffee, cola or tea per day"; Categories were compared by means Fisher's exact test. The "never" category was significantly different from each of the other categories (p < 0.001).

Benko et al. BMC Pediatrics 2011 11:73   doi:10.1186/1471-2431-11-73
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