Table 1. Estimated Cronbach alpha values for each case overall and each subscale
Case Religious Beliefs (RB) Angry Father (AF) Maternal Smoking (MS) Intimate Partner Violence (IPV)
N Alpha (CI) N Alpha (CI) N Alpha (CI) N Alpha (CI)
Whole instrument   36 0.91(0.86, 0.95) 33 0.76(0.62, 0.87) 36 0.91(0.86, 0.95) 38 0.94(0.91, 0.97)
Subscales                
Initiating the Session 4 0.60 (0.33, 0.78) 5 0.44 (0.08, 0.70) 4 0.38 (-0.03, 0.67) 4 0.43 (0.05, 0.69)
Gathering Information 8 0.80 (0.68, 0.89) 7 0.49 (0.17, 0.72) 8 0.77 (0.62, 0.87) 9 0.86 (0.78, 0.93)
Building the Relationship 6 0.89 (0.81, 0.94) 9 0.52 (0.22, 0.74) 6 0.93 (0.88, 0.96) 6 0.87 (0.79, 0.93)
Providing Structure 2 -0.57 (-1.67, 0.17) 3 -0.22 (-1.05, 0.35) 2 0.53 (0.20, 0.75) 2 0.26 (-0.26, 0.61)
Sharing Information 12 0.60 (0.36, 0.78) 5 0.44 (0.08, 0.70) 12 0.65 (0.44, 0.81) 13 0.87 (0.79, 0.93)
Closing the Session 2 0.73 (0.55, 0.86) 2 0.52 (0.18, 0.74) 2 0.65 (0.41, 0.82) 2 0.82 (0.69, 0.90)
Overall Performance 2 0.81 (0.68, 0.90) 2 Not estimable 2 0.62 (0.35, 0.80) 2 0.82 (0.69, 0.90)

Note: N is the number of items for each particular instrument or subscale. Cronbach’s alpha estimates and 95% confidence intervals are listed. Values of internal consistency (IC) can be interpreted as follows: alpha 0.90 indicates excellent IC. Bold values are those in the acceptable range or above.

 Int J Med Educ. 2016; 7:168-179; doi: 10.5116/ijme.5740.4262