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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