, Classified into four categories: clear, slightly turbid, turbid

, Classified into four categories: new moon, first quarter, last quarter

, Victim's activity, classified into two categories: practising a board sports vs other activities

, Attack outcome, classified into two categories: fatal or non-fatal

, Attack location, classified into two categories: western part of Reunion Island vs eastern part

, Hour of attack, classified into two categories: before or after 12 pm

, Month of attack, classified into two categories: summer (October to March) or winter

, Day of the week when the attack occurred

, The letter beside the p-value indicates the test used (s for Student's t-test, w for Welsch's t-test, m for Mann-Withney u test, k for chi-squared test, f for Fisher's exact test)

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