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Table 5. Null hypothesis probabilities for Chi squared association analyses on subgroup of attendees who never take drugs. PET = post exposure tinnitus lasting for longer than 5mins. ST = spontaneous tinnitus lasting for longer than 5mins. NC = night-club. ND = no drugs taken.

Table 5. Null hypothesis probabilities for Chi squared association analyses on subgroup of attendees
who never take drugs. PET = post exposure tinnitus lasting for longer than 5mins. ST = spontaneous
tinnitus lasting for longer than 5mins. NC = night-club. ND = no drugs taken.