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Table 4 Predictors of length-of-stay ≥4 days among children with mild to severe bronchiolitis: logistic regression analysis

From: Viral aetiology of bronchiolitis in hospitalised children in Qatar

  LOS <4 days LOS ≥ 4 days Odds Ratio (OR) (95% CI) P-Value
Demographic characteristics
 Age group
   ≤ 1 month 25 (42.4%) 118 (41.5%) 1.36 (0.70, 2.7) 0.369
  1 to 3 months 15 (25.4%) 100 (35.2%) 1.92 (0.91, 4.0) 0.086
   > 3 months 19 (32.2%) 66 (23.2%) 1.0 (Reference)  
  Male 39 (62.9%) 196 (67.4%) 1.22 (0.69, 2.15) 0.500
  Female 23 (37.1%) 95 (32.6%) 1.0 (Reference)  
  Qatari 38 (61.3%) 185 (63.6%) 1.1 (0.63, 1.9) 0.735
  Non-Qatari 24 (38.7%) 106 (36.4%) 1.0 (Reference)  
Types of viruses, seasonal trend and severity
 RSV 22 (50%) 103 (39.3%) 1.0 (Reference)  
 RV 3 (6.8%) 33 (12.6%) 2.35 (0.66, 8.35) 0.187
 RSV + RV 3 (6.8%) 21 (8%) 1.50 (0.41, 5.46) 0.542
 RSV+ any other non-RV 3 (6.8%) 30 (11.5%) 2.14 (0.60, 7.63) 0.243
 RV+ any other non-RSV 3 (6.8%) 19 (7.3%) 1.35 (0.37, 4.97) 0.649
 Others 10 (22.7%) 56 (21.4%) 1.20 (0.53, 2.70) 0.667
Seasons
 Spring 8 (12.9%) 35 (12%) 1.25 (0.53, 2.90) 0.610
 Summer 2 (3.2%) 18 (6.2%) 2.57 (0.57, 11.6) 0.220
 Fall 18 (29%) 119 (41%) 1.89 (1.01, 3.53) 0.046
 Winter 34 (54.8) 119 (40.9) 1.0 (Reference)  
 ICS score: 3 to 4 27 (43.5%) 156 (55.5%) 1.62 (0.93, 2.82) 0.089
 ICS score: 1 to 2 35 (56.5%) 125 (44.5%) 1.0 (Reference)  
Medical history and physical exam findings
 Cough 59 (95.2%) 286 (99.3%) 7.27 (1.2, 44.5) 0.032
 Wheezing 40 (66.7%) 189 (66.5%) 0.99 (0.55, 1.8) 0.986
 Crepitation 42 (76.4%) 226 (85.6%) 1.84 (0.90, 3.7) 0.092
 Retraction 33 (60%) 215 (80.2%) 2.70 (1.5, 5.1) 0.002
 Fever 47 (78.3%) 212 (76.3%) 0.89 (0.45, 1.74) 0.731
 Apnea 3 (5.6%) 21 (8.4%) 1.56 (0.45, 5.4) 0.485
 Pertussis like symptoms 3 (5.5%) 26 (11%) 2.15 (0.63, 7.4) 0.225
 Family history of asthma 22 (55%) 121 (56.3%) 1.1 (0.53, 2.1) 0.881
 Maximum temperature (°C) 38.39 ± 0.87 38.52 ± 0.78 1.22 (0.86, 1.73) 0.255
 Maximum respiratory rate (br/m) 60.34 ± 15.13 62.99 ± 13.32 1.02 (0.99, 1.1) 0.160
 Maximum pulse rate (beat/m) 161.8 ± 22.1 169.1 ± 18.1 1.01 (1.0, 1.03) 0.011
 O2 saturation (%) 97.37 ± 1.84 96.18 ± 2.53 0.78 (0.66, 0.89) 0.001
  1. LOS Length of stay in hospital, ICS Initial clinical severity score, OR odds ratio, CI confidence interval. Dichotomous outcome LOS <4 days considered as reference group