Table 1(a).
Baseline characteristics of women according to cytomegalovirus immunoglobulin (Ig)G antibody titrers
| Cytomegalovirus IgG antibody titre quartiles | |||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | ||
| Characteristics | <230 titre (n = 297) | 290–9 300 titre (n = 234) | 9 400–15 000 titre (n = 289) | 16 000–46 000 titre (n = 254) | *P-value |
| Age (years)* | 31·2 (4·9) | 30·8 (5·0) | 32·4 (5·0) | 32·1 (4·7) | 0·120 |
| Smokers, % daily‡ | 16·2 | 20·3 | 20·4 | 21·3 | 0·413 |
| Occupational status, % manual‡§ | 21·0 | 25·9 | 21·7 | 25·0 | 0·424 |
| Education, % comprehensive school‡ | 6·7 | 7·8 | 10·4 | 8·3 | 0·990 |
| Body mass index (kg/m2)* | 23·9 (4·1) | 24·0 (4·4) | 24·4 (4·3) | 24·5 (4·6) | 0·200 |
| Waist circumference (cm)* | 77·7 (10·3) | 77·8 (10·6) | 79·9 (11·2) | 79·6 (11·7) | 0·166 |
| Waist–hip ratio* | 0·79 (0·06) | 0·78 (0·06) | 0·80 (0·06) | 0·80 (0·06) | 0·145 |
| Systolic blood pressure (mmHg)* | 115·3 (12·2) | 116·4 (12·2) | 116·9 (11·6) | 115·2 (12·8) | 0·288 |
| Diastolic blood pressure (mmHg)* | 71·3 (8·2) | 71·4 (9·1) | 72·4 (8·1) | 71·2 (8·9) | 0·360 |
| Total cholesterol (mmol/l)* | 5·00 (0·84) | 5·03 (0·88) | 5·07 (0·91) | 5·05 (0·96) | 0·780 |
| HDL cholesterol (mmol/l)* | 1·40 (0·29) | 1·44 (0·29) | 1·38 (0·30) | 1·38 (0·30) | 0·302 |
| LDL cholesterol (mmol/l)* | 3·09 (0·73) | 3·08 (0·75) | 3·18 (0·75) | 3·16 (0·82) | 0·453 |
| Triglycerides (mmol/l)† | 1·00 (0·80–1·30) | 1·00 (0·80–1·30) | 1·00 (0·75–1·40) | 1·00 (0·78–1·30) | 0·591 |
| Glucose (mmol/l)* | 4·8 (0·5) | 4·8 (0·6) | 4·9 (0·8) | 4·8 (1·1) | 0·453 |
| Insulin (mU/l)† | 6·0 (5·0–8·0) | 6·0 (4·0–8·0) | 7·0 (5·0–9·0) | 6·0 (4·0–9·0) | 0·766 |
| C-reactive protein (mg/l)† | 0·77 (0·30–1·90) | 1·00 (0·38–2·50) | 0·84 (0·33–2·22) | 0·80 (0·34–2·29) | 0·941 |
| Physical activity index*‖ | 17·7 (15·9) | 16·2 (13·6) | 15·8 (15·6) | 16·4 (14·5) | 0·886 |
| Alcohol (no. drinks per week)* | 3·4 (4·3) | 4·2 (5·5) | 3·7 (4·9) | 3·9 (7·9) | 0·763 |
| IMT (mm)* | 0·56 (0·08) | 0·57 (0·09) | 0·58 (0·09) | 0·58 (0·08) | 0·221 |
| Cdist (%/10 mmHg)* | 2·38 (0·81) | 2·32 (0·71) | 2·30 (0·76) | 2·33 (0·76) | 0·996 |
| FMD (%)*# | 8·49 (4·55) | 8·73 (4·43) | 8·72 (4·60) | 9·24 (4·52) | 0·070 |
*
Mean values and standard deviation, t-test for difference between highest CMV antibody titrers compared to other groups.
†
Median values and interquartile range (IQR), Mann–Whitney U-test for difference between highest CMV antibody titres compared to other groups.
‡
Percentages and χ2 test for difference between highest CMV antibody titres compared to other groups.
§
Data missing for 136 participants.
‖
Data missing for 231 participants.
#
Data missing for 62 participants.
HDL: high-density lipoprotein; LDL: low-density lipoprotein; IMT: carotid intima-media thickness; Cdist: carotid artery distensibility; FMD: flow-mediated dilation.