Table 3

Internal consistency and criterion validity of the 12 item Stroke Specific Quality of Life Scale in three different samples

Physical dimensionPsychosocial dimensionTotal SS-QoL-12
Cronbach's alpha
 Development sample0.830.850.89
 SAH validation sample0.780.890.89
 Stroke validation sample0.800.770.85
Explained variance (%)
 Development sample949595
 SAH validation sample949093
 Stroke validation sample918891
Mean difference (95% CI)*
 Development sample0.01 (−0.01 to 0.03)−0.01 (−0.05 to 0.03)0.07 (0.04 to 0.10)
 SAH validation sample0.02 (0.00 to 0.05)0.13 (0.08 to 0.20)0.08 (0.05 to 0.12)
 Stroke validation sample−0.01 (−0.05 to 0.03)−0.05 (−0.10 to 0.01)−0.03 (−0.07 to 0.01)
Limits of agreement
 Development sample−0.31–0.32−0.49–0.46−0.30–0.43
 SAH validation sample−0.24–0.29−0.56–0.83−0.32–0.48
 Stroke validation sample−0.45–0.43−0.67–0.57−0.46–0.39
  • * Difference SS-QoL-49 and SS-QoL-12 (positive figure if mean score SS-QoL-49 <mean score SS-QoL-12).

  • SAH, subarachnoid haemorrhage; SS-QoL, Stroke Specific Quality of Life Scale; SS-QoL-12, 12 item Stroke Specific Quality of Life Scale.