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. 2012 Jun 19;7(3):330–339. doi: 10.1111/j.1750-2659.2012.00395.x

Table 6.

Multivariate linear regression model, reporting associations between virus group, participant characteristics and symptom score

Variables Mean Score (95% CI) Adjusted coefficient* (95% CI) P‐value
Virus Group (ref: None)
 None  7·5 (7·1, 7·8) Ref
 Picorna  7·4 (6·8, 8·0) −0·04 (−0·72, 0·65) 0·9
Influenza 10·2 (9·4, 10·9)  2·6 (1·6, 3·6) <0·001
 Corona  7·3 (6·2, 8·3) −0·11 (−1·5, 1·3) 0·9
 Other  7·7 (6·5, 8·9)  0·26 (−0·85, 1·4) 0·6
Age (ref: 18–24 years)
 18–24 years  7·9 (7·4, 8·3) Ref
 25–34 years  7·6 (6·9, 8·3) −0·37 (−1·3, 0·55) 0·4
 35–44 years  7·6 (7·0, 8·2) −0·48 (−1·3, 0·34) 0·3
 45–54 years  7·5 (6·9, 8·2) −0·21 (−1·1, 0·69) 0·6
 55–64 years  8·0 (7·1, 8·8)  0·14 (−0·83, 1·1) 0·8
Sex (ref: male)
 Male  7·7 (7·2, 8·1) Ref
 Female  7·7 (7·4, 8·1)  0·40 (−0·19, 1·0) 0·2
Race (ref: Caucasian)
 Caucasian  7·8 (7·5, 8·1) Ref
Asian  6·3 (5·3, 7·3) −1·4 (−2·5, ‐0·26) 0·02
 Other  7·1 (5·5, 8·8) −0·34 (−2·2, 1·5) 0·7
Smoking status (ref: Current)
 Current  7·6 (6·6, 8·7) Ref
 Ever  7·9 (7·4, 8·4)  0·07 (−1·0, 1·2) 0·9
 Never  7·6 (7·2, 7·9) −0·01 (−1·1, 1·0) 1·0
 Unknown  9·6 (4·7, 14·5) −0·43 (−3·4, 2·6) 0·8

*Adjusted for month of collection and study site. Bold text indicates P < 0.05.