Mean apnoea-hypopnoea index (AHI) at polysomnography (PSG) 1 and PSG 2 in different subgroups and mean difference between groups
| n | Intervention group n=32 | p Value | n | Control group n=33 | p Value | Mean difference (CI) | p Value | |||
|---|---|---|---|---|---|---|---|---|---|---|
| PSG 1 | PSG 2 | PSG 1 | PSG 2 | |||||||
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | |||||||
| BMI <30 | 23 | 52 (20) | 23 (18) | <0.001 | 23 | 51 (21) | 46 (23) | 0.202 | −25 (−38 to −11) | <0.001 |
| BMI ≥30 | 9 | 56 (19) | 17 (14) | 0.001 | 10 | 55 (23) | 48 (24) | 0.144 | −31 (−49 to −13) | 0.002 |
| Tonsil size 1–2 | 14 | 48 (17) | 24 (21) | 0.007 | 16 | 52 (22) | 46 (25) | 0.177 | −17 (−34 to 0) | 0.046 |
| Tonsil size 3–4 | 18 | 58 (21) | 19 (13) | <0.001 | 17 | 53 (22) | 48 (22) | 0.224 | −34 (−47 to −20) | <0.001 |
| Tongue position 1 | 9 | 50 (19) | 16 (8) | <0.001 | 7 | 45 (11) | 38 (23) | 0.325 | −27 (−43 to −10) | 0.004 |
| Tongue position 2 | 20 | 55 (22) | 22 (18) | <0.001 | 22 | 52 (21) | 48 (21) | 0.410 | −29 (−44 to −14) | <0.001 |
| Tongue position 3 | 3 | 54 (5) | 27 (27) | 0.269 | 4 | 71 (32) | 53 (33) | 0.011 | −9 (−48 to 30) | 0.579 |
| Friedman stage I | 16 | 57 (23) | 16 (9) | <0.001 | 13 | 48 (15) | 46 (19) | 0.759 | −39 (−53 to −25) | <0.001 |
| Friedman stage II | 16 | 50 (15) | 26 (21) | 0.004 | 20 | 56 (25) | 47 (26) | 0.032 | −15 (−30 to 0) | 0.047 |
Data are mean (SD) for within-group comparisons and mean (95% CI) for between-group comparisons.
p values from comparisons of dependent samples within groups and from independent samples between groups (t tests).
Significant differences (p<0.05) are shown in bold type.
BMI, body mass index; n, number of patients in each group.