Table 1

 Characteristics of the 8588 women participating in RHINE

Aarhus(n = 1362)Reykjavik(n = 1075)Bergen(n = 1301)Gøteborg(n = 1185)Umeå(n = 1356)Uppsala(n = 1351)Tartu(n = 958)All(n = 8588)
*Waking with tightness in chest and/or waking with shortness of breath.
†Symptoms Q1–Q6: Wheeze, wheeze with shortness of breath, wheeze without cold, waking with tightness in chest, waking with shortness of breath, waking with cough, asthma attacks, current asthma medication.
Irregular menstruation (%)2020212525282123
    <43 years (%)1112131417192015
    ⩾43 years (%)3633354337432637
Oral contraceptives (%)14198.61410161013
Pregnant (%)5.63.83.32.92.42.11.83.2
Post-menopausal (%)8.417171214114.412
Hormone replacement therapy (%)3.4189.08.07.66.91.37.6
Asthma (%)6.48.17.47.3118.21.97.3
Wheeze with shortness of breath and when not having a cold (%)9.19.6151313117.311
Night time symptoms (%)*8.311141514132214
Three or more asthma symptoms (%)†1412161618151515
Hay fever or nasal allergy (%)2325262724242324
Current smokers (%)3329373122202828
Median age (years)3941403941403539
Median BMI (kg/m2)22.523.923.023.723.923.222.423.3