Table 2 Internal consistency of the three-factors structure
From: Construct validity of the Suboptimal Health Status Questionnaire-25 in a Ghanaian population
Domain/Cronbach’s α | Label | Item (each question is preceded by in the past 3 months) | Cronbach’s α if item is deleted |
|---|---|---|---|
Fatigue (0.861) | SHSf13 | How often were you exhausted without greatly increasing your physical activity? | 0.839 |
SHSf14 | How often did you have fatigue which could not be substantially alleviated by rest? | 0.841 | |
SHSf15 | How often were you lethargic in your daily life? | 0.847 | |
SHSf16 | How often did you suffer from headaches? | 0.855 | |
SHSf18 | How often did your eyes ache or feel tired? | 0.852 | |
SHSf19 | How often did your muscles or joints feel stiff? | 0.846 | |
SHSf20 | How often did you have pain in your shoulders/neck/back? | 0.846 | |
SHSf21 | How often did you have a heavy feeling in your legs when walking? | 0.847 | |
SHSCS22 | How often did you feel out of breath while resting? | 0.852 | |
SHSCS28 | How often did you have difficulty tolerating hot and cold temperatures? | 0.851 | |
SHSf17 | How often did you suffer from dizziness? | 0.809 | |
Immuno-cardiovascular (0.821) | SHSCS23 | How often did you suffer from chest congestion? | 0.792 |
SHSSC24 | How often were you bothered by heart palpitations? | 0.806 | |
SHSDS25 | How often was your appetite poor? | 0.808 | |
SHSDS26 | How often did you suffer from heartburn? | 0.804 | |
SHSDS27 | How often did you suffer from nausea? | 0.805 | |
SHSIS29 | How often did you catch a cold? | 0.808 | |
SHSIS30 | How often did you suffer from a sore throat? | 0.801 | |
SHSMS31 | How often did you have difficulty falling asleep? | 0.817 | |
SHSMH37 | How often were you troubled by waking up during the night? | 0.813 | |
SHSMH37 | How often did you feel nervous or jittery | 0.803 | |
Cognition (0.853) | SHSMH33 | How often did you have trouble with your short-term memory? | 0.863 |
SHSMH34 | How often did you did you have difficulty responding to situations quickly or making decisions? | 0.802 | |
SHSMH35 | How often did you have difficulty concentrating? | 0.790 | |
SHSMH36 | How often were you distracted for no reason? | 0.808 |