Table 2.

Study Procedures Repeated Within Each Treatment Condition

		Södra skånska regementet	Karlberg
Screening* *conducted once per subject to determine eligibility; not repeated within each treatment	Informed Consent	xx	xx
	Medical Questionnaires	xx	xx
	Otoscopy	xx	xx
	Tympanometry	xx	xx
	Stapedius Reflex	xx	xx
	Pure-tone Audiometry	xx	xx
	Randomization (Masked)	xx	xx
One day prior to the shooting exercises; “Pre-1”	Questionnaires	xx	xx
	Blood sample	xx	--
	Pure-tone Audiometry	xx	xx
	DPOAE tests	xx	xx
	PMTF tests	xx	--
	Treatment #1 (1/2 dose)	xx	xx
	Treatment #2 (1/2 dose)	xx	xx
Day of the shooting exercises, pre-noise; “Pre-2”	Treatment #3 (1/2 dose)	xx	xx
	Questionnaires	xx	xx
	Pure-tone Audiometry	xx	xx
	DPOAE tests	xx	xx
	PMTF tests	xx	--
	Treatment #4 (1/2 dose)	xx	xx
Shooting Exercise	Machine Gun Training	xx	xx
	Tinnitus Survey	xx	xx
“Post-1” Day of the shooting exercises, starting 15 min post noise	Pure-tone Audiometry	xx	xx
	DPOAE tests	xx	xx
	Blood sample	xx	--
“Post-2” Day of the shooting exercises, starting 1 hr 45 min post noise	Pure-tone Audiometry	xx	xx
	DPOAE tests	xx	xx
	Tinnitus survey	xx	xx
“Post-3” Day of the shooting exercises, starting 3 hr 30 min post noise	Pure-tone Audiometry	xx	xx
	DPOAE tests	xx	xx
	Tinnitus survey	xx	xx
	PMTF tests	xx	--
“Post-4” One day post shooting	Pure-tone Audiometry	xx	xx
	DPOAE tests	xx	xx
	Tinnitus survey	xx	xx
	PMTF tests	xx	--