Table 1.
Sociodemographic differences between the sample groups (for baseline samples: web and paper respondents; for longitudinal samples: web, mix and paper respondents among those that answered all three waves)
| Characteristics measured at baseline | HEARTS baseline web sample (n = 4068) | HEARTS baseline paper sample (n = 1845) | P-value | HEARTS longitudinal web sample (n = 2510) |
HEARTS longitudinal mix sample (n = 1065) |
P-value | HEARTS longitudinal paper sample (n = 369) | P-value |
|---|---|---|---|---|---|---|---|---|
| Age | ||||||||
| Mean age | 63.1 | 63.2 | 0.075 | 63.1 | 63.3 | 0.011 | 63.5 | < 0.001 |
| Sex | ||||||||
| Women | 51.4 | 59.2 | < 0.001 | 50.6 | 60.4 | < 0.001 | 63.5 | < 0.001 |
| Education | ||||||||
| Primary or below | 12.1 | 23.5 | 10.5 | 14.5 | 28.0 | |||
| Secondary | 32.7 | 37.2 | 31.9 | 32.9 | 40.4 | |||
| Tertiary | 55.3 | 39.4 | < 0.001 | 57.7 | 52.6 | 0.001 | 31.6 | < 0.001 |
| Marital status | ||||||||
| Married/partner | 75.1 | 68.4 | < 0.001 | 77.4 | 75.2 | 0.313 | 57.5 | < 0.001 |
| Country of birth | ||||||||
| Other than Sweden | 10.7 | 13.2 | 0.008 | 9.1 | 8.2 | 0.414 | 10.8 | 0.290 |
| Retirement status | ||||||||
| Fully retired | 20.5 | 25.3 | < 0.001 | 20.9 | 23.1 | 0.159 | 32.9 | < 0.001 |
Note: Age is presented as mean values with p-values from t-tests. All other variables are presented as proportions with p-values from Chi2-tests. P-values refers to comparison with the baseline or longitudinal web-sample