Table 2.

HR of hearing impairment according to baseline HbA1c (n=202 975)

	HbA1c (%) (mg/dL)							P for quadratic
	<5.0 (<91)	5.0–5.4 (91–110)	5.5–5.9 (111–125)	6.0-.6.4 (126–139)	6.5–6.9 (140–153)	7.0–7.9 (154–182)	≥8 (≥183)
Low frequency
Men
Person-year	54 055	275 953	261 290	44 807	11 798	10 637	11 613
No cases	84	447	548	122	45	26	39
Model 1	1.15 (0.91 to 1.45)	1.00	0.98 (0.86 to 1.11)	0.94 (0.77 to 1.15)	1.11 (0.81 to 1.51)	0.73 (0.49 to 1.08)	1.22 (0.88 to 1.70)	0.15
Model 2	1.11 (0.88 to 1.40)	1.00	1.00 (0.88 to 1.14)	0.98 (0.79 to 1.20)	1.16 (0.84 to 1.60)	0.75 (0.49 to 1.15)	1.26 (0.88 to 1.80)	0.27
Women
Person-year	28 447	137 761	143 295	25 083	4136	2760	2576
No cases	65	415	553	133	18	14	9
Model 1	1.04 (0.80 to 1.35)	1.00	0.90 (0.79 to 1.03)	0.94 (0.77 to 1.14)	0.71 (0.44 to 1.14)	0.86 (0.51 to 1.48)	0.68 (0.35 to 1.31)	0.79
Model 2	1.04 (0.80 to 1.35)	1.00	0.91 (0.80 to 1.03)	0.93 (0.76 to 1.14)	0.67 (0.41 to 1.10)	0.77 (0.43 to 1.38)	0.57 (0.28 to 1.19)	0.51
High frequency
Men
Person-year	53 617	273 025	257 812	44 093	11 621	10 345	11 424
No cases	280	1610	1941	416	116	128	130
Model 1	1.05 (0.92 to 1.19)	1.00	0.98 (0.91 to 1.04)	0.91 (0.82 to 1.02)	0.82 (0.67 to 0.99)	1.05 (0.88 to 1.26)	1.15 (0.96 to 1.38)	0.003
Model 2	1.03 (0.90 to 1.17)	1.00	0.99 (0.92 to 1.06)	0.93 (0.83 to 1.03)	0.84 (0.69 to 1.02)	1.08 (0.89 to 1.32)	1.18 (0.97 to 1.43)	0.007
Women
Person-year	28 520	138 232	143 882	25 246	4124	2753	2555
No cases	23	169	277	67	18	13	15
Model 1	1.02 (0.66 to 1.58)	1.00	1.00 (0.83 to 1.22)	0.97 (0.73 to 1.29)	1.43 (0.88 to 2.34)	1.62 (0.92 to 2.86)	2.41 (1.42 to 4.10)	0.03
Model 2	1.03 (0.66 to 1.60)	1.00	0.97 (0.80 to 1.17)	0.86 (0.64 to 1.16)	1.17 (0.70 to 1.95)	1.24 (0.67 to 2.29)	1.78 (0.95 to 3.34)	0.08

Model 1: Adjusted for age.

Model 2: Adjusted for age, walking time, smoking status, alcohol consumption, self-reported diabetes, BMI, hypertension and hyperlipidaemia.

BMI, body mass index; HbA1c, haemoglobin A1c.