Table 2. Replies to questionnaire.

		GPA + TB	GPA − TB	GPB − TB
		n = 46	n = 47	n = 74
Q1	Hard to hear or understand? (%yes)	30.4	31.9	27.0
Q3	Do sounds bother you? (% yes)	69.6*	53.2	47.3
Q4	Listen to music with ear phones? (%yes)	95.5	89.4	91.9
	Low Volume	4.5†	9.5	8.8
	Medium volume	79.5	50.0	67.6
	High Volume	15.9	40.5	23.5
	One-two days/week	40.9◊	23.8	32.4
	Three-four days/week	38.6	45.8	54.1
	Five-seven days/week	20.5	31.0	60.6
Q5	Attend parties/shows with loud sound? (% yes)	89.1	80.9	78.4
	Tinnitus after?	73.2*	63.2	32.8
Q6	Exposed to loud sound in last 14 hours? (% yes)	21.7*	10.6	8.1
Q7	Use a mobile phone? (%yes)	95.7	95.7	95.9

Entries are percent of subjects reporting. Questions (Q) are given in full text in Table 1s.

^*GPA + TB vs GPA − TB + GPB − TB p = 0.0180 or better. See text for details.

^†Interaction Low/High Volume × GPA + TB vs GPA − TB + GPB − TB p = 0.0044.

^◊Interaction 1–2/5–7 days × GPA + TB vs GPA − TB + GPB − TB p = 0.0017.