Table 6.
Cronbach's alpha comparisons/data subsets
| Study | Sample | n | Cronbach's alpha | ||
|---|---|---|---|---|---|
| This study | Earthquake victims (Spanish) | 26,737 | 0.95 | ||
|
Davidson et al. (1997) |
Rape, war, hurricane victims (USA) | 241 | 0.99 | ||
|
Chen et al. (2001) |
Earthquake victims (Chinese) | 210 | 0.97 | ||
| Declercq and Willemsen (2006) | Security company and Red Cross (Belgium) | 544 | 0.97 | ||
|
Ford‐Gilboe et al. (2009) |
Domestic abuse victims (Canada) | 309 | 0.95 | ||
|
Seo et al. (2008) |
PTSD patients (Korea) | 254 | 0.97 | ||
| Data subset | n | Cronbach's alpha | Data subset | n | Cronbach's alpha |
|---|---|---|---|---|---|
| Income loss | House crowding | ||||
| Q1 | 5,407 | 0.943 | None | 23,458 | 0.946 |
| Q2 | 5,372 | 0.946 | Medium | 2,981 | 0.950 |
| Q3 | 5,269 | 0.947 | Severe | 286 | 0.947 |
| Q4 | 5,297 | 0.947 | |||
| Q5 | 5,392 | 0.949 | House damage | ||
| Low/none | 23,641 | 0.944 | |||
| Below poverty line (2010) | Moderate | 2,200 | 0.944 | ||
| No | 22,079 | 0.946 | Heavy | 896 | 0.954 |
| Yes | 4,658 | 0.949 | |||
| Peak ground acceleration tercilea | |||||
| Lost job | T1 | 5,624 | 0.941 | ||
| No | 23,247 | 0.946 | T2 | 5,205 | 0.942 |
| Yes | 2,597 | 0.950 | T3 | 5,257 | 0.945 |
a
Only 16,086 of overall 27,737‐person sample had entries for peak ground acceleration.