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Table 5 Level of reported symptoms within each treatment step

From: Assessing Asthma control in UK primary care: Use of routinely collected prospective observational consultation data to determine appropriateness of a variety of control assessment models

BTS Treatment step

0

n = 5,477

1

n = 7,274

2

n = 29,629

3

n = 10,678

4

n = 11,491

5

n = 380

Symptoms

4,401

80%

6,065

83%

24,801

84%

8,754

82%

10,125

88%

357

94%

  1. A Chi squared test for trend showed a statistically significant difference in distribution: λ2 trend 146.811 df 1 p < 0.0001