Age (months) | Tympanogram | Aboriginal | Non-Aboriginal | ||
---|---|---|---|---|---|
 |  | Field | Clinic | Field | Clinic |
3–4 | A | 13 (52%) | 5 (33%) | 65 (77%) | 17(68%) |
 | B | 11 (44%) | 8 (53%) | 9 (11%) | 5(20%) |
 | C | 1 (4%) | 2 (13%) | 11 (13%) | 3(12%) |
5–9 | A | 11(36%) | 8(22%) | 66 (61%) | 47(56%) |
 | B | 18 (58%) | 26(72%) | 30 (27%) | 26(31%) |
 | C | 2 (6%) | 2(6%) | 13 (12%) | 11(13%) |
10–14 | A | 15 (40%) | 7(19%) | 63 (54%) | 31(49%) |
 | B | 18 (49%) | 25(69%) | 26 (22%) | 18(29%) |
 | C | 4 (11%) | 4(11%) | 27 (23%) | 14(22%) |
15–19 | A | 11 (39%) | 5(22%) | 48 (60%) | 36(52%) |
 | B | 13 (46%) | 15(65%) | 16 (20%) | 21(30%) |
 | C | 4 (14%) | 3(13%) | 16 (20%) | 12(17%) |
20 + | A | 7 (21%) | 2(20%) | 54 (63%) | 8(44%) |
 | B | 18 (53%) | 6(60%) | 14 (17%) | 5(28%) |
 | C | 9 (26%) | 2(20%) | 17 (20%) | 5(28%) |