Table 2.
Frequency of Common Colds During Pregnancy
| Cold Measures | Control (n = 117) | Asthma (n = 168) | Effect Size | P Value |
|---|---|---|---|---|
| Subjects with ≥ 1 cold (probable by CCQ) during pregnancya | 54 (46) | 120 (71.4) | RR, 1.83; 95% CI (1.39, 2.41) | < .0001 |
| Subjects with > 1 common cold during pregnancya | 19 (16.2) | 55 (32.7) | RR, 1.25; 95% CI (1.09, 1.42) | .0028 |
| No. of colds per personb | 0 (0, 1) | 1 (0, 2) | … | < .0001 |
| Range, 0-6 | Range, 0-8 | |||
| No. of common cold events/person-wkc | 0.035 | 0.067 | IRR, 1.77; 95% CI (1.30, 2.42) | < .0001 |
| Cold events by season | … | … | ||
| Summerd | 13 (15.7) | 33 (14.8) | ||
| Autumnd | 24 (28.9) | 53 (23.8) | ||
| Winterd | 26 (31.3) | 75 (33.6) | ||
| Springd | 20 (24.1) | 62 (27.8) |
Seasons were Australian summer (December-February), autumn (March-May), winter (June-August), spring (September-November). CCQ = common cold questionnaire; IRR = incidence rate ratio; RR = relative risk. See Table 1 legend for expansion of other abbreviation.
a
No. (%), χ2 test, RR.
b
Median (IQR), Mann-Whitney test.
c
IRR, Poisson regression, adjusted for atopy, parity, and BMI.
d
No. (%).