Table 6 The percentage of patients with increasing levels of impairment. The percentage of N-ISAT patients classified with no deficit, and 'mild, 'moderate' and 'severe' levels of impairment. No deficit = ≤ 1 impaired score on measures, a mild deficit is 2 or 3 impaired scores, a moderate deficit is 4–6 impaired scores, and a severe deficit is > 7 impaired scores

No missing data (n = 376)

Including missing data (n = 459)

No missing data (n = 449)

Including missing data (n = 509)

Not counting missing data (n = 560)

Counting missing data (n = 560)

No deficit

33.8

29.0

46.1

43.6

31.8

29.8

Mild deficit

29.8

27.4

27.9

25.7

28.4

27.3

Moderate deficit

21.8

19.4

15.8

16.9

21.6

20.2

Severe deficit

14.6

24.2

10.2

13.8

18.2

22.7