Table 1.
The number (%) of participants with respiratory symptoms or allergies by sex and survey
| Respiratory symptom or allergy | Males (n=147)
|
Females (n=171)
|
P-value comparing surveysa | P-value comparing sexb | P-value for sex × time interactionc | ||
|---|---|---|---|---|---|---|---|
| 1993 | 2013 | 1993 | 2013 | ||||
| Wheeze | 53 (36%) | 39 (27%) | 75 (44%) | 46 (27%) | <0.001 | 0.385 | 0.250 |
| SOB after activity | 45 (31%) | 59 (40%) | 64 (37%) | 73 (43%) | 0.018 | 0.262 | 0.504 |
| Nocturnal cough | 39 (27%) | 38 (26%) | 70 (41%) | 58 (34%) | 0.289 | 0.006 | 0.405 |
| Morning sputum | 24 (16%) | 17 (12%) | 11 (6%) | 11 (7%) | 0.405 | 0.008 | 0.385 |
| Nasal allergies | 64 (44%) | 74 (50%) | 91 (53%) | 95 (56%) | 0.061 | 0.132 | 0.408 |
| Skin allergies | 66 (45%) | 53 (36%) | 92 (54%) | 78 (46%) | 0.004 | 0.049 | 0.814 |
| Current asthma | 32 (22%) | 36 (24%) | 42 (25%) | 48 (28%) | 0.105 | 0.474 | 0.881 |
Notes:
a
P-value calculated from logistic regression (with GEEs) – marginal effect of time,
b
P-value calculated from logistic regression (with GEEs) – marginal effect of sex, and
c
P-value calculated from logistic regression (with GEEs) interaction for sex × time.
Abbreviations: GEE, generalized estimating equations; SOB, shortness of breath.