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. 2018 Dec;25:72–79. doi: 10.1016/j.epidem.2018.05.008

Table 3.

Relative risk (RR) of pneumococcal carriage and ARS by level of reported number of daily casual contacts.

Number of casual contacts N Crude RR (95%CI) Age-adjusted RR (95%CI)
Pneumococcal carriage
0 – 9 315 ref ref
10 – 19 119 0.82 (0.52; 1.27) 0.80 (0.55; 1.75)
≥20 56 0.81 (0.44; 1.49) 1.19 (0.70; 2.04)
Unknown 76 1.52 (1.00; 2.31) 1.07 (0.77; 1.49)



Acute respiratory symptoms (ARS)
0 – 9 315 ref ref
10 – 19 119 1.02 (0.65; 1.49) 1.00 (0.65; 1.54)
≥20 56 0.51 (0.21; 1.27) 0.56 (0.22; 1.39)
Unknown 76 1.01 (0.45; 2.28) 0.88 (0.38; 2.00)

RR = Risk Ratio. CI = Confidence Interval.