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Table 5 Effect modification by sports activity

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

   Less active (lower third, N = 485) High active (upper third, N = 488)   
   Prevalence (%) Prevalence (%)   
Outcome indicators Approach Non-obese (N = 379) Obese (N = 106) OR 95% CI Non-obese (N = 454) Obese (N = 34) OR 95% CI OR less/OR more active P-value
Monthly level:
 Any RTI crude 37.9 38.8 0.98 (0.72; 1.35) 33.7 51.6 2.56 (1.54; 4.26) 0.38 0.002
adjusteda    1.00 (0.73; 1.37)    2.58 (1.56; 4.27) 0.39 0.002
 Any URTI crude 32.0 33.8 1.03 (0.75; 1.42) 29.2 46.7 2.63 (1.56; 4.43) 0.39 0.003
adjusteda    1.08 (0.78; 1.49)    2.70 (1.61; 4.52) 0.40 0.003
 Any LRTI crude 10.3 10.3 1.19 (0.67; 2.13) 6.1 14.6 5.17 (2.14;12.49) 0.23 0.006
 Sinusitis adjusteda    0.94 (0.53; 1.67)    4.31 (1.82;10.21) 0.22 0.004
crude 6.9 9.3 1.36 (0.72; 2.58) 6.1 15.1 4.35 (1.70;11.13) 0.31 0.045
adjusteda    1.42 (0.75; 2.70)    4.16 (1.62;10.69) 0.34 0.063
 Rhinitis crude 27.1 29.0 1.02 (0.74; 1.41) 24.2 39.3 2.46 (1.47; 4.09) 0.42 0.004
adjusteda    1.09 (0.79; 1.50)    2.52 (1.52; 4.16) 0.43 0.005
 Otitis media crude 0.84 0.71 1.03 (0.28; 3.75) 0.84 1.60 1.69 (0.28;10.22) 0.61 0.659
adjusteda    0.97 (0.27; 3.45)    1.80 (0.32;10.02) 0.54 0.570
 Pharyngitis/Laryngitis crude 10.1 10.4 1.15 (0.73; 1.81) 10.2 22.8 3.98 (2.03; 7.80) 0.29 0.003
adjusteda    1.14 (0.72; 1.80)    3.85 (1.96; 7.57) 0.30 0.003
 Tonsillitis crude 1.9 1.8 1.07 (0.37; 3.13) 2.1 3.9 4.25 (1.24;14.61) 0.25 0.098
adjusteda    1.28 (0.45; 3.60)    5.33 (1.56;18.15) 0.24 0.079
 Influenza-like illness crude 12.0 13.6 1.08 (0.77; 1.52) 10.4 22.6 3.45 (2.08; 5.75) 0.31 < 0.001
adjusteda    1.08 (0.77; 1.52)    3.46 (2.08; 5.75) 0.31 < 0.001
 Bronchitis crude 10.3 10.0 1.09 (0.60; 1.97) 6.0 14.2 4.78 (1.94;11.78) 0.23 0.007
adjusteda    0.86 (0.48; 1.54)    3.93 (1.62; 9.51) 0.22 0.005
 Pneumonia crude 0.18 0.43 5.07 (0.64;40.15) 0.18 0.95 27.64 (1.02;751.94) 0.18 0.372
adjusteda    5.02 (0.56;44.91)    19.80 (0.95;410.73) 0.25 0.449
 Other acute resp. infections crude 3.1 1.8 0.48 (0.18; 1.32) 1.9 2.2 1.53 (0.37; 6.41) 0.31 0.196
adjusteda    0.44 (0.16; 1.21)    1.33 (0.32; 5.46) 0.33 0.214
  ≥ 3 RTIs crude 9.0 10.6 1.26 (0.78; 2.05) 7.5 19.9 5.57 (2.73;11.34) 0.23 < 0.001
adjusteda    1.20 (0.74; 1.94)    5.07 (2.50;10.27) 0.24 < 0.001
 Long RTIs crude 14.9 16.5 1.19 (0.73; 1.93) 10.4 26.4 5.37 (2.53;11.40) 0.22 0.001
adjusteda    1.07 (0.66; 1.75)    4.91 (2.31;10.43) 0.22 < 0.001
 Upper 10% in diary score crude 11.1 13.3 1.21 (0.74; 1.96) 8.2 21.9 5.53 (2.65;11.52) 0.22 < 0.001
adjusteda    1.13 (0.70; 1.84)    5.10 (2.45;10.61) 0.22 < 0.001
Seasonal level:
  ≥ 4 months RTIs crude 21.1 24.3 1.32 (0.66; 2.64) 14.8 32.8 6.27 (2.07;18.95) 0.21 0.019
adjusteda    1.30 (0.65; 2.61)    5.86 (1.94;17.69) 0.22 0.023
  ≥ 3 long RTIs crude 10.2 13.2 1.59 (0.82; 3.12) 7.6 26.0 7.54 (2.88;19.69) 0.21 0.009
adjusteda    1.35 (0.69; 2.65)    6.59 (2.53;17.16) 0.20 0.007
 Upper 10% in diary score crude 10.9 14.5 1.63 (0.64; 4.16) 7.1 33.7 39.36 (8.94;173.29) 0.04 < 0.001
adjusteda    1.27 (0.50; 3.23)    31.05 (7.52;128.22) 0.04 < 0.001
Individual level:
 Upper 10% in diary score crude 12.1 13.2 1.10 (0.58; 2.09) 6.6 35.3 7.71 (3.48;17.07) 0.14 < 0.001
adjusteda    0.94 (0.49; 1.81)    7.00 (3.12;15.75) 0.13 < 0.001
  1. aadjusted by age (continuous) and educational status (three categories)