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Table 1 Comparisons of the present Swe-CBSEI and Lowe’s (1993) original study for nulliparous women, in terms of descriptive statistics and internal consistency reliability with Cronbach’s coefficient α

From: Psychometric properties of the Swedish childbirth self-efficacy inventory (Swe-CBSEI)

Scales Present study, Swe-CBSEI Lowe’s CBSEI (1993)
(n = 406) (n = 264)
Outcome-AL   
Range 30-187 74-150
Mean 110. 9 128.5
Median 116.0
SD 25.7 14.3
Cronbach’s alpha coefficient α. 0.89 0.86
Efficacy-AL   
Range 19-150 15-150
Mean 95.0 101.1
Median 95.0
SD 23.3 21.5
Cronbach’s alpha coefficient α. 0.92 0.93
Outcome-SS   
Range 20-160 62-160
Mean 116.2 130.0
Median 121.0
SD 27.4 20.1
Cronbach’s alpha coefficient α. 0.94 0.90
Efficacy-SS   
Range 16-160 16-169
Mean 99.2 104.4
Median 101.0
SD 27.5 26.4
Cronbach’s alpha coefficient α. 0.94 0.95
Outcome-Total   
Range 1-310 156-310
Mean 223.5 258.4
SD 52.7 31.6
Cronbach’s alpha coefficient α. 0.95  
Efficacy-Total   
Range 35-310 31-310
Mean 191.3 205.5
SD 50.7 45.8
Cronbach’s alpha coefficient α. 0.96