Table 2.
Differences in demographic variables between the study sample (≥2 assessments, n=1,925,376) and those not included in the analysis for study 1 (1 assessment only, n=152,747).
| Characteristics | 1 Assessment, % (n) |
≥2 Assessments, % (n) |
χ2 | Cramer V | df | P value | |
| Sex |
|
|
1371.56 | .05 | 2 | <.001 | |
|
|
Male | 13% (19,857.11) | 10% (192,537.60) |
|
|
|
|
|
|
Female | 87% (132,889.89) | 90% (1,732,838.40) |
|
|
|
|
| Age range (years) |
|
|
4075.98 | .07 | 5 | <.001 | |
|
|
18–24 | 20% (30,549.40) | 13.9% (267,627.26) |
|
|
|
|
|
|
25–34 | 30% (45,824.10) | 30% (577,612.80) |
|
|
|
|
|
|
35–44 | 24% (36,659.28) | 28% (539,105.28) |
|
|
|
|
|
|
45–54 | 17% (25,966.99) | 19% (365,821.44) |
|
|
|
|
|
|
55–64 | 8% (12,219.76) | 8% (154,030.08) |
|
|
|
|
|
|
≥65 | 1.5% (2291.21) | 1.5% (28,880.64) |
|
|
|
|
| Employment status |
|
|
1804.80 | .12 | 5 | <.001 | |
|
|
Retired | 3% (4,582.41) | 3% (57,761.28) |
|
|
|
|
|
|
Self-employed | 12% (18,329.64) | 12% (23,1045.12) |
|
|
|
|
|
|
Unemployed | 6% (9,164.82) | 6% (115,522.56) |
|
|
|
|
|
|
Student | 14% (21,384.58) | 11% (21,1791.36) |
|
|
|
|
|
|
Employed | 57% (87,065.79) | 62% (1,193,733.12) |
|
|
|
|
|
|
Homemaker | 7% (10,692.29) | 7% (134,776.32) |
|
|
|
|
| Parental status |
|
|
1714.74 | .05 | 5 | <.001 | |
|
|
Children ≥19 years | 7% (10,692.29) | 5.4% (103,970.30) |
|
|
|
|
|
|
Children 13–18 years | 2% (3,054.94) | 2% (38,507.52) |
|
|
|
|
|
|
Children 0–12 years | 5% (7,637.35) | 5% (96,268.80) |
|
|
|
|
|
|
Children of different ages | 5% (7,637.35) |
4% (77,015.04) |
|
|
|
|
|
|
No children | 15% (22,912.05) | 18% (346,567.68) |
|
|
|
|