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. 2011 May 31;6(1):71–77. doi: 10.1111/j.1750-2659.2011.00265.x

Table 2.

 Correlates of severe disease, by single or multiple virus illnesses

Correlate, n (%) All collected samples (n = 893) Single virus illnesses (n = 463) Multiple virus illnesses (n = 103) OR* (95% CI; P value) AOR** (95% CI; P value)
Admitted to inpatient ward 683 (76) 347 (75) 66 (64) 0·60 (0·38, 0·94; 0·03) 0·55 (0·34, 0·91; 0·02)
Admitted in intensive care unit 111 (12) 47 (10) 2 (2) 0·18 (0·04, 0·73; 0·02) 0·22 (0·05, 0·91; 0·04)
Extended hospital stay required (>3 days) 260 (29) 119 (26) 9 (9) 0·38 (0·14, 0·57; <0·001) 0·32 (0·15, 0·66; 0·002)
Supplemental oxygen required 291 (33) 162 (35) 23 (22) 0·53 (0·32, 0·88; 0·01) 0·55 (0·33, 0·92; 0·02)
Assisted ventilation required 91 (10) 35 (8) 1 (1) 0·12 (0·02, 0·88; 0·04) 0·13 (0·02, 1·00; 0·05)
Antibiotics used 403 (45) 201 (44) 42 (41) 0·89 (0·58, 1·38; 0·61) 0·88 (0·56, 1·37; 0·57)
Bronchodilators used 416 (47) 60 (59) 232 (50) 1·44 (0·93, 2·23; 0·10) 1·31 (0·82, 2·08; 0·24)
Abnormal radiographic finding*** 202 (39) 113 (42) 22 (40) 0·90 (0·50, 1·63; 0·73) 0·87 (0·47, 1·61; 0·66)
Fever present within 24 hours of sample 346 (39) 195 (42) 45 (44) 1·07 (0·69, 1·64; 0·77) 0·95 (0·60, 1·49; 0·82)

*Crude odds ratio for multiple virus illnesses compared with single virus illnesses.

**Adjusted odds ratio, for multiple virus illnesses compared with single virus illnesses, controlling for age and presence of chronic disease.

***Among 512 chest X‐rays performed (266 in single virus illness group and 55 in multiple virus illness group).