TABLE 2

Characteristics of participants in the Swiss Paediatric Airway Cohort (SPAC) by March 2018

CharacteristicsTotal participants (n=347)Participants by age
<5 years (n=99)5–9 years (n=116)≥10 years (n=132)
Study centre
 Bern87 (25)27 (27)26 (22)34 (26)
 Zurich129 (38)31 (31)41 (35)57 (43)
 Lucerne102 (29)35 (35)41 (35)26 (20)
 Basel29 (8)6 (6)8 (7)15 (11)
Demographics
 Age years8±43±17±113±2
 Male sex214 (62)67 (68)68 (59)79 (60)
Symptoms#,
 Wheeze217 (63)77 (78)76 (66)64 (48)
 Cough at night apart from colds167 (48)48 (48)61 (53)58 (44)
 Rhinitis apart from colds188 (54)43 (43)67 (58)78 (59)
 Exercise-induced respiratory symptoms200 (58)36 (36)63 (54)101 (77)
 Habitual snoring (most nights) apart from colds46 (13)10 (10)15 (13)21 (16)
Environmental exposures
 Maternal smoking64 (18)19 (19)18 (16)27 (20)
 Paternal smoking93 (27)29 (29)26 (22)38 (29)
 Living on a farm15 (4)6 (6)3 (3)6 (5)
 Pets at home118 (34)22 (22)38 (33)58 (44)
 Mould in the house34 (10)15 (15)11 (9)8 (6)
Physical activity
 Not very active31 (9)3 (3)7 (6)21 (16)
 Moderately active223 (64)58 (59)74 (64)91 (69)
 Very active93 (27)38 (38)35 (30)20 (15)
Treatment history
 Used inhaled SABA259 (75)82 (83)95 (82)82 (83)
 Used ICS184 (59)55 (63)59 (57)70 (58)

Data is displayed as n (%) or mean±sd. SABA: short-acting β-agonists; ICS: inhaled corticosteroids; ISAAC: International Study of Asthma and Allergies in Childhood. #: questions on symptoms were based on questions used in the ISAAC study, either alone or in combination (e.g. pulmicort, axotide, seretide and symbicort); : data as recorded over the past 12 months.