Table 1. Baseline sample characteristics by SF36-VT quartiles of 15,654 EPIC-Norfolk participants (1993-1997).
| Characteristic | SF-36 vitality score quartiles | |||
|---|---|---|---|---|
| Q1 (100-76) |
Q2 (75-66) |
Q3 (65-51) |
Q4 (50-0) |
|
| Total N (%) | 3879 | 3007 | 4077 | 4691 |
| Age (years) mean (SD) | 59.25 (8.67) | 58.97 (0.09) | 59.29 (9.25) | 58.80 (9.42) |
| Sex | ||||
| Male N (%) | 1935 (49.88) | 1380 (45.89) | 1770 (43.41) | 1821 (38.82) |
| Female N (%) | 1944 (50.12) | 1627 (54.11) | 2307 (56.59) | 2870 (61.18) |
| Body Mass Index (kg/m2) | ||||
| < 18.5 | 12 (0.31) | 12 (0.40) | 19 (0.47) | 31 (0.66) |
| 18.5 – 24.9 | 1701 (43.85) | 1275 (42.40) | 1599 (39.22) | 1815 (38.69) |
| 25.0 – 30.0 | 1783 (45.96) | 1376 (45.76) | 1861 (45.65) | 2021 (43.08) |
| Over 30.0 | 383 (9.87) | 344 (11.44) | 598 (14.67) | 824 (17.57) |
| Systolic BP (mmHg) mean (SD) | 135.38 (17.74) | 134.57 (18.04) | 134.99 (18.54) | 134.47 (18.11) |
| Serum cholesterol (mmol/l) mean (SD) | 6.15 (1.12) | 6.16 (1.16) | 6.18 (1.17) | 6.18 (1.16) |
| Diabetes Mellitus (self-reported) | 64 (1.65) | 49 (1.63) | 69 (1.69) | 130 (2.77) |
| Use of antidepressant drugs | 75 (1.93) | 81 (2.69) | 184 (4.51) | 400 (8.53) |
| Myocardial Infarction (self-reported) | 60 (1.55) | 67 (2.23) | 112 (2.75) | 202 (4.31) |
| Cancer (self-reported) | 167(4.31) | 149 (4.96) | 207 (5.08) | 332 (7.08) |
| COPD (self-reported) | 231 (5.96) | 209 (6.95) | 410 (10.06) | 539 (11.49) |
| Fruit intake (g/day) median (IQR) | 222.55 (196.00) | 224.40 (191.55) | 217.10 (190.93) | 203.90 (191.75) |
| Vegetable intake (g/day) median (IQR) | 230.55 (157.80) | 228.63 (143.68) | 229.04 (138.69) | 217.12 (141.66) |
| Alcohol consumption (g/day) median (IQR) | 4.50 (8.50) | 4.00 (9.00) | 4.00 (8.50) | 3.00 (8.00) |
| Smoking Status (self-reported) | ||||
| Current | 372 (9.59) | 261 (8.68) | 415 (10.18) | 599 (12.77) |
| Former | 1586 (40.89) | 1259 (41.87) | 1756 (43.07) | 1936 (41.27) |
| Never | 1921 (49.52) | 1487 (49.45) | 1906 (46.75) | 2156 (45.96) |
| Physical Activity (self-reported) | ||||
| Inactive | 858 (22.12) | 754 (25.07) | 1124 (27.57) | 1569 (33.45) |
| Moderately Inactive | 1104 (28.46) | 931 (30.96) | 1201 (29.46) | 1372 (29.25) |
| Moderately Active | 976 (25.16) | 720 (23.94) | 1035 (25.39) | 1009 (21.51) |
| Active | 941 (24.26) | 602 (20.02) | 717 (17.59) | 741 (15.79) |
| Townsend score median (IQR) | -2.69 (2.34) | -2.81 (2.00) | -2.67 (2.63) | -2.54 (2.55) |
| Social Class | ||||
| Professional | 280 (7.22) | 279 (9.28) | 306 (7.51) | 310 (6.61) |
| Managerial | 1563 (40.29) | 1176 (39.11) | 1558 (38.21) | 1678 (35.77) |
| Skilled non-manual | 636 (16.40) | 485 (16.13) | 711 (17.44) | 828 (17.65) |
| Skilled manual | 848 (21.86) | 665 (22.12) | 850 (20.85) | 1043 (22.23) |
| Semi-skilled manual | 444 (11.45) | 321 (10.68) | 541 (13.27) | 647 (13.79) |
| Non-skilled | 108 (2.78) | 81 (2.69) | 111 (2.72) | 185 (3.94) |
| Educational Attainment | ||||
| Degree or Higher | 545 (14.05) | 436 (14.50) | 573 (14.05) | 606 (12.92) |
| A-Level | 1673 (43.13) | 1282 (42.63) | 1665 (40.84) | 1863 (39.71) |
| O-Level | 403 (10.39) | 318 (10.58) | 439 (10.77) | 531 (11.32) |
| No Qualification | 1258 (32.43) | 971 (32.29) | 1400 (34.34) | 1691 (36.05) |
| Vitamin use | 1652 (42.59) | 1318 (43.83) | 1811 (44.42) | 2138 (45.58) |
| Anaemia N (%) | 767 (29.23) | 583 (27.64) | 768 (26.6) | 844 (25.39) |
The data presented as mean and (SD) for normally distributed continuous variables, median and interquartile range (IQR) for non-normally distributed variables, and number (N) and percentage (%) for categorical variables. P values indicate levels of significance across all quartiles, these were calculated using student’s T test and T test for unequal variance for normally distributed data and the Kruskal-Wallis test for non-normally distributed data. P values for categorical variables were calculated using the Chi squared test. f The following data had missing values: anaemia (30% missing).