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Table 6 Effect modification by nutritional status

From: Obesity and risk of respiratory tract infections: results of an infection-diary based cohort study

   More unfavourable nutrition (lower third, N = 379) More favourable nutrition (upper third, N = 530)   
   Prevalence (%) Prevalence (%)   
Outcome indicators Approach Non-obese (N = 325) Obese (N = 54) OR 95% CI Non-obese (N = 467) Obese (N = 63) OR 95% CI OR unfavourable/OR favourable nutrition P-value
Monthly level:
 Any RTI crude 34.8 37.4 1.10 (0.72; 1.68) 35.8 49.3 1.99 (1.34; 2.94) 0.55 0.045
adjusteda    1.13 (0.74; 1.74)    2.02 (1.36; 2.99) 0.56 0.049
 Any URTI crude 30.0 32.9 1.13 (0.73; 1.77) 31.0 43.8 2.01 (1.34; 3.01) 0.57 0.064
adjusteda    1.22 (0.78; 1.91)    2.10 (1.40; 3.14) 0.58 0.075
 Any LRTI crude 7.5 8.4 1.75 (0.79; 3.85) 8.0 14.5 3.13 (1.58; 6.19) 0.56 0.274
adjusteda    1.22 (0.56; 2.67)    2.43 (1.24; 4.74) 0.50 0.187
 Sinusitis crude 5.9 7.7 1.54 (0.64; 3.67) 7.2 14.2 2.40 (1.14; 5.04) 0.64 0.443
adjusteda    1.55 (0.64; 3.75)    2.33 (1.09; 4.94) 0.67 0.491
 Rhinitis crude 26.7 28.3 1.04 (0.67; 1.62) 25.5 37.5 1.99 (1.33; 2.97) 0.52 0.034
adjusteda    1.17 (0.75; 1.82)    2.14 (1.43; 3.19) 0.55 0.044
 Otitis media crude 1.35 0.60 0.46 (0.06; 3.43) 0.82 1.16 1.73 (0.36; 8.27) 0.27 0.312
adjusteda    0.61 (0.08; 4.63)    2.17 (0.48; 9.84) 0.28 0.320
 Pharyngitis/Laryngitis crude 8.6 8.5 1.10 (0.58; 2.09) 10.3 18.3 2.80 (1.65; 4.77) 0.39 0.028
adjusteda    1.08 (0.57; 2.06)    2.79 (1.63; 4.76) 0.39 0.025
 Tonsillitis crude 2.25 0.46 0.14 (0.02; 1.04) 1.72 2.09 1.63 (0.47; 5.66) 0.09 0.042
adjusteda    0.19 (0.03; 1.40)    1.99 (0.57; 6.95) 0.10 0.050
 Influenza-like illness crude 11.9 13.9 1.22 (0.77; 1.95) 10.4 20.3 2.43 (1.60; 3.70) 0.50 0.032
adjusteda    1.23 (0.77; 1.98)    2.42 (1.58; 3.71) 0.51 0.035
 Bronchitis crude 7.5 8.4 1.77 (0.80; 3.94) 7.9 13.8 2.71 (1.34; 5.45) 0.65 0.434
adjusteda    1.23 (0.55; 2.70)    2.09 (1.05; 4.17) 0.58 0.312
 Pneumonia crude 0.06 0.00 1.00 (.;.) 0.25 0.99 14.92 (1.10;202.01) 0.07 0.042
adjusteda    1.00 (.;.)    7.30 (0.89;59.69) 0.14 0.064
 Other acute resp. infections crude 2.5 1.4 0.73 (0.19; 2.75) 2.1 3.3 1.38 (0.46; 4.13) 0.53 0.464
adjusteda    0.64 (0.17; 2.43)    1.22 (0.41; 3.61) 0.52 0.456
  ≥ 3 RTIs crude 8.6 7.9 1.01 (0.51; 2.00) 8.0 17.3 3.72 (2.11; 6.55) 0.27 0.004
adjusteda    1.01 (0.51; 2.00)    3.53 (2.00; 6.25) 0.29 0.005
 Long RTIs crude 11.4 14.8 1.77 (0.89; 3.50) 12.0 26.4 3.87 (2.12; 7.05) 0.46 0.091
adjusteda    1.50 (0.76; 2.99)    3.31 (1.81; 6.05) 0.46 0.088
 Upper 10% in diary score crude 9.6 9.9 1.26 (0.64; 2.47) 9.3 21.3 3.58 (2.01; 6.36) 0.35 0.021
adjusteda    1.14 (0.58; 2.24)    3.24 (1.82; 5.78) 0.35 0.020
Seasonal level:
  ≥ 4 months RTIs crude 18.5 19.8 1.11 (0.41; 3.05) 18.1 38.5 6.31 (2.59;15.41) 0.18 0.012
adjusteda    1.10 (0.40; 3.02)    5.82 (2.39;14.18) 0.19 0.014
  ≥ 3 long RTIs crude 8.0 10.7 1.64 (0.63; 4.32) 8.8 24.5 5.52 (2.55;11.95) 0.30 0.052
adjusteda    1.38 (0.51; 3.73)    4.72 (2.15;10.34) 0.29 0.053
 Upper 10% in diary score crude 9.5 9.1 0.89 (0.18; 4.36) 8.9 28.7 14.73 (4.41;49.21) 0.06 0.006
adjusteda    0.61 (0.12; 3.02)    10.65 (3.41;33.28) 0.06 0.004
Individual level:
 Upper 10% in diary score crude 9.5 9.3 0.97 (0.36; 2.61) 8.3 25.4 3.74 (1.94; 7.19) 0.26 0.026
adjusteda    0.77 (0.28; 2.10)    3.12 (1.58; 6.15) 0.25 0.022
  1. aadjusted by age (continuous) and educational status (three categories)