Antibiotic prescriptions by age, sex, parental allergy, social class, and sibship
| ⩾1 prescriptions by age 5 | ⩾5 prescriptions by age 5 | ||||
|---|---|---|---|---|---|
| N | n (%) | p value* | n (%) | p value* | |
| *Adjusted for the other factors in the table. | |||||
| Age | |||||
| ⩽30 | 294 | 246 (84%) | <0.001 | 101 (34%) | <0.001 |
| 31–34 | 251 | 180 (72%) | 54 (22%) | ||
| ⩾35 | 201 | 138 (69%) | 25 (12%) | ||
| Sex | |||||
| Female | 421 | 322 (76%) | 0.49 | 105 (25%) | 0.014 |
| Male | 325 | 242 (74%) | 75 (23%) | ||
| Parental allergic disease | |||||
| − | 472 | 360 (76%) | 0.48 | 104 (22%) | 0.22 |
| + | 238 | 177 (74%) | 67 (28%) | ||
| Social class | |||||
| I/II | 110 | 86 (78%) | 0.23 | 24 (22%) | 0.94 |
| III | 416 | 305 (73%) | 103 (25%) | ||
| IV/V | 166 | 128 (77%) | 40 (24%) | ||
| No. of siblings | |||||
| 0/1 | 309 | 232 (75%) | 0.24 | 86 (28%) | 0.01 |
| 2 | 224 | 179 (80%) | 53 (24%) | ||
| 3 | 119 | 86 (72%) | 24 (20%) | ||
| 4+ | 94 | 67 (71%) | 17 (18%) | ||