Unit | SIDS | Controls | P value | |||
N | Median (IQR) | N | Median (IQR) | |||
Right ear | ||||||
Duration | Seconds | 12 | 20 (18–38.5) | 77 | 23 (11–37.5) | 0.98 |
Artefact rate* | % | 11 | 2 (0–13) | 75 | 7 (1–19) | 0.36 |
Stimulus stability† | % | 11 | 100 (100–100) | 75 | 100 (100–100) | 0.62 |
Probe fit | % | 8 | 42 (20.5–72.25) | 75 | 49 (28–58) | 0.83 |
Left ear | ||||||
Duration | Seconds | 12 | 10.5 (6.75–15.5) | 77 | 16 (11–38) | 0.03 |
Artefact rate‡ | % | 11 | 0 (0–29) | 74 | 4 (0–17) | 0.40 |
Stimulus stability§ | % | 11 | 100 (100–100) | 74 | 100 (100–100) | 0.23 |
Probe fit | % | 8 | 42 (20.5–72.25) | 74 | 44 (33.75–54) | 0.42 |
*Artefact rate <20% in 2/11 (18.2%) SIDS and 17/75 (22.7%) controls (p=0.74).
†Stimulus stability >80% in all 11 SIDS and 72/75 (96%) controls.
‡Artefact rate <20% in 3/11 (27.3%) SIDS and 13/74 (17.6%) controls (p=0.45).
§Stimulus stability >80% in all 11 SIDS and 71/74 (95.9%) controls.
SIDS, sudden infant death syndrome.