Number of children with normal or abnormal overnight oximetry readings on nights 2 and 3, following either normal or abnormal night 1 reading, by clinical group
| Clinical diagnosis | |||||
|---|---|---|---|---|---|
| 2nd and 3rd night both normal | 2nd night abnormal, 3rd night normal | 2nd night normal, 3rd night abnormal | 2nd and 3rd night both abnormal | Subtotal | |
| First-night oximetry normal and three nights’ oximetry recorded (N=84) | |||||
| Central nervous system disorder | 2 | 0 | 1 | 1 | 4 |
| Suspected obstructive sleep apnoea (no other diagnosis) | 33 | 3 | 7 | 12 | 55 |
| Neuromuscular disorder | 5 | 4 | 1 | 3 | 13 |
| Cranial–facial abnormalities | 3 | 2 | 1 | 0 | 6 |
| Down syndrome | 2 | 1 | 0 | 3 | 6 |
| Total (all diagnoses) | 45 | 10 | 10 | 19 | 84 |
| First-night oximetry abnormal and three nights’ oximetry recorded (N=48) | |||||
| Central nervous system disorder | 1 | 0 | 0 | 9 | 10 |
| Suspected obstructive sleep apnoea (no other diagnosis) | 1 | 1 | 0 | 13 | 15 |
| Neuromuscular disorder | 1 | 0 | 0 | 6 | 7 |
| Cranial–facial abnormalities | 0 | 3 | 0 | 6 | 9 |
| Down syndrome | 1 | 1 | 0 | 5 | 7 |
| Total (all diagnoses) | 4 | 5 | 0 | 39 | 48 |
Analysis restricted to 132 children with at least three nights of technically adequate results.