Table 3

Comparison of changes from beginning to end of study in clinical outcomes between treatment and placebo groups

Medical outcome variable
HDM Impermeable bedding, n = 23
Placebo bedding, n = 20
95% CI of difference
Significance p

Mean change in 28-day PEF litres/min (sd)
16.38 (25.62)
13.68 (43.14)
-25.15 to 19.75
0.81
Mean change in 28-day asthma symptom scores (sd)
-3.40 (29.50)
-18.10 (27.80)
-33.16 to 3.86
0.12
Mean change in 28-day rhinitis symptom scores (sd)
-31.14 (35.79)
-22.67 (30.70)
-13.15 to 30.09
0.43
Mean change in episodes of monthly night-time waking over 28-day period (sd)
-0.64 (3.00)
-0.94 (2.30)
-2.05 to 1.93
0,43
Mean change in 28-day dose of inhaled steroids mcg (sd)
-1815.91 (3861.45)
-1039.00 (1881.15)
-1128.58 to 2682.59
0.41
Median non-study GP consultations (range)
1 (0–5)
0 (0–5)

0.26
Total number of hospital admissions for asthma
0
0

1
Total number of courses of oral steroids for asthma
2
2

1

Sheikh et al. BMC Family Practice 2002 3:12   doi:10.1186/1471-2296-3-12