Table 1

Summary statistics for respiratory data overall and by school

AllRuralUrban1Urban2
Number of pupils177479535
Sex (% girls)595743100
Age
    Mean (SD)10.7 (1.4)9.1 (1.0)10.6 (0.3)12.7 (0.3)
    Range7.2–13.17.2–10.810.2–11.112.2–13.1
    % current wheeze24202234
Max. PEFR (l/min)
    Mean (SD)330 (54)293 (38)328 (48)381 (41)
    Range201–488201–382228–439281–488
Cough
    Mean % days reported (SD)28.6 (25.3)28.7 (25.6)25.9 (24.8)36.0 (25.7)
    Range0–97.80–87.90–97.80–94.5
Cold
    Mean % days reported (SD)41.2 (30.4)43.3 (32.9)37.0 (28.5)49.7 (30.7)
    Range0–1000–980–10013.8–100
No. of days recorded per child
    Mean (SD)50.4 (9.7)51.4 (8.2)47.2 (10.4)57.8 (3.9)
    Range14–6319–6114–6250–63
% of days with PEFR >20% below median
    Mean (SD)3.4 (6.7)4.2 (8.9)3.8 (6.5)1.4 (2.5)
    Range0–46.90–46.90–26.10–9