Distribution of comorbidities and their associations with different factors
| No of comorbidities | No (%) | Sex | Age (Years) | |||
| Male (%) | Female (%) | 0-3 (%) | 4-7 (%) | 8-18 (%) | ||
| No comorbidities | 30 (0.74) | 20 (66.67) | 10 (33.33) | 6 (20.00) | 13 (43.33) | 11 (36.67) |
| One comorbidity | 2709 (66.97) | 1833 (67.66) | 876 (32.34) | 814 (30.05) | 1591 (58.73) | 304 (11.22) |
| Top five patterns of one comorbidity: | ||||||
| OSAHS +chronic rhinitis | 1518 (37.53) | 1025 (67.52) | 493 (32.48) | 442 (29.12) | 905 (59.62) | 171 (11.26) |
| OSAHS +allergic rhinitis | 1138 (28.13) | 770 (67.66) | 368 (32.34) | 359 (31.55) | 655 (57.56) | 124 (10.90) |
| OSAHS +chronic tonsillitis | 15 (0.37) | 8 (53.33) | 7 (46.67) | 2 (13.33) | 7 (46.67) | 6 (40.00) |
| OSAHS +adenoidal hypertrophy | 14 (0.35) | 11 (78.57) | 3 (21.43) | 3 (21.43) | 9 (64.29) | 2 (14.29) |
| OSAHS +chronic sinusitis | 8 (0.20) | 5 (62.50) | 3 (37.50) | 2 (25.00) | 6 (75.00) | 0 (00.00) |
| P value | 0.688 | 0.035 | ||||
| Two comorbidities | 1210 (29.91) | 817 (67.52) | 393 (32.48) | 363 (30.00) | 748 (61.82) | 99 (8.18) |
| Top five patterns of two comorbidities: | ||||||
| OSAHS +chronic rhinitis +chronic exudative otitis media | 440 (10.88) | 292 (66.36) | 148 (33.64) | 173 (39.32) | 247 (56.14) | 20 (4.55) |
| OSAHS +allergic rhinitis +chronic exudative otitis media | 321 (7.94) | 218 (67.91) | 103 (32.09) | 113 (35.20) | 196 (61.06) | 12 (3.74) |
| OSAHS +allergic rhinitis +chronic tonsillitis | 179 (4.43) | 112 (62.57) | 67 (37.43) | 32 (17.88) | 122 (68.16) | 25 (13.97) |
| OSAHS +chronic rhinitis +chronic tonsillitis | 171 (4.23) | 124 (72.51) | 47 (27.49) | 28 (16.37) | 122 (71.35) | 21 (12.28) |
| OSAHS +adenoidal hypertrophy +tonsil hypertrophy | 19 (0.47) | 15 (78.95) | 4 (21.05) | 1 (5.26) | 12 (63.16) | 6 (31.58) |
| P value | 0.254 | <0.001 | ||||
| ≥3 comorbidities* | 96 (2.37) | 62 (64.58) | 34 (35.42) | 30 (31.25) | 61 (63.54) | 5 (5.21) |
| No of comorbidities | No of admissions | No of operations | LOS | |||
| 1 (%) | ≥2 (%) | 0 (%) | 1 (%) | ≥2 (%) | Median (IQR) | |
| No comorbidities | 26 (86.67) | 4 (13.33) | 12 (40.00) | 18 (60.00) | 0 (00.00) | 2.00 (1.00–2.00) |
| One comorbidity | 2416 (89.18) | 293 (10.82) | 38 (1.40) | 2640 (97.45) | 31 (1.14) | 2.00 (2.00–2.00) |
| Top five patterns of one comorbidity: | ||||||
| OSAHS +chronic rhinitis | 1356 (89.33) | 162 (10.67) | 16 (1.05) | 1492 (98.29) | 10 (0.66) | 2.00 (2.00–2.00) |
| OSAHS +allergic rhinitis | 1013 (89.02) | 125 (10.98) | 12 (1.05) | 1119 (98.33) | 7 (0.62) | 2.00 (2.00–2.00) |
| OSAHS +chronic tonsillitis | 11 (73.33) | 4 (26.67) | 1 (6.67) | 14 (93.33) | 0 (0.00) | 2.00 (2.00–3.00) |
| OSAHS +adenoidal hypertrophy | 13 (92.86) | 1 (7.14) | 8 (57.14) | 1 (7.14) | 5 (35.71) | 1.00 (1.00–3.00) |
| OSAHS +chronic sinusitis | 8 (100.00) | 0 (00.00) | 1 (12.50) | 7 (87.50) | 0 (0.00) | 2.00 (1.00–3.00) |
| P value | 0.275 | <0.001 | 0.491 | |||
| Two comorbidities | 1089 (90.00) | 121 (10.00) | 24 (1.98) | 628 (51.90) | 558 (46.12) | 2.00 (2.00–2.00) |
| Top five patterns of two comorbidities: | ||||||
| OSAHS +chronic rhinitis +chronic exudative otitis media | 393 (89.32) | 47 (10.68) | 8 (1.82) | 167 (37.95) | 265 (60.23) | 2.00 (2.00–3.00) |
| OSAHS +allergic rhinitis +chronic exudative otitis media | 292 (90.97) | 29 (9.03) | 1 (0.31) | 74 (23.05) | 246 (76.64) | 2.00 (2.00–2.00) |
| OSAHS +allergic rhinitis +chronic tonsillitis | 166 (92.74) | 13 (7.26) | 2 (1.12) | 176 (98.32) | 1 (0.56) | 2.00 (2.00–2.00) |
| OSAHS +chronic rhinitis +chronic tonsillitis | 146 (85.38) | 25 (14.62) | 2 (1.17) | 166 (97.08) | 3 (1.75) | 2.00 (2.00–2.00) |
| OSAHS +adenoidal hypertrophy +tonsil hypertrophy | 18 (94.74) | 1 (5.26) | 1 (5.26) | 9 (47.37) | 9 (47.37) | 4.00 (3.00–4.00) |
| P value | 0.169 | <0.001 | <0.001 | |||
| ≥3 comorbidities* | 81 (84.38) | 15 (15.63) | 4 (4.17) | 21 (21.88) | 71 (73.96) | 2.00 (2.00–3.00) |
The p values in table 2 were used to reflect the differences in the top five patterns within the one comorbidity group and two comorbidities group.
*The subgroups of ≥3 comorbidities are not shown in this table since the frequency distribution was uniform and comorbidities varied greatly.
LOS, length of stay; OSAHS, obstructive sleep apnoea–hypopnoea syndrome.