Table 1

Baseline characteristics of 880 patients with first-time myocardial infarction in 2009 by quartiles* of mental health status (Mental Component Summary score from the Short-Form 12 V.2)

Baseline MCS Score
Variable†First quartile n=220Second quartile n=220Third quartile n=220Fourth quartile n=220p Value
Self-reported health‡
 Mental health status (MCS score)§, mean (range)28.8 (11.1–37.2)42.2 (37.2–47.0)51.0 (47.0–54.5)57.7 (54.5–60.8)<0.001
 HADS-A/D ≥8, No. (%)152 (69.7)79 (36.07)22 (10.0)2 (0.91)<0.001
Sociodemographic characteristics
 Age, years, mean (SD)68.9 (12.4)68.4 (12.3)65.6 (11.2)64.5 (10.0)<0.001
 Male sex, N (%)120 (54.6)138 (62.7)177 (80.5)173 (78.6)<0.001
 Cohabitation status, living alone, N (%)¶94 (42.7)82 (37.3)55 (25.0)47 (21.4)<0.001
Education, N (%)¶
 <10 years114 (53.3)105 (50.2)85 (39.7)76 (35.5)
 10–12 years76 (35.5)81 (38.8)99 (46.3)101 (47.2)
 >12 years24 (11.2)23 (11.0)30 (14.0)37 (173)0.004
Labour market status, N (%)¶
 Working50 (22.7)70 (31.8)99 (45.0)103 (46.8)
 Pension136 (61.8)123 (55.9)105 (47.7)107 (48.6)
 Out of the work force34 (15.5)27 (12.3)16 (7.3)10 (4.6)<0.001
Health status‡
 Body mass index, mean (SD)26.5 (5.1)26.3 (4.8)26.8 (4.5)26.9 (4.5)0.626
Comorbid conditions, N (%)**
 Hypertension††88 (40.0)75 (34.1)54 (24.6)54 (24.6)<0.001
 Stroke21 (9.6)16 (7.3)7 (3.2)5 (2.3)0.002
 TCI12 (5.5)3 (1.4)3 (1.4)10 (4.6)0.021
 Revascularisation37 (16.8)16 (7.3)12 (5.5)15 (6.8)<0.001
 Heart failure16 (7.3)4 (1.8)4 (1.8)4 (1.8)<0.001
 Diabetes mellitus51 (23.2)38 (17.3)24 (10.9)21 (9.6)<0.001
 Depression‡‡44 (20.0)21 (9.6)11 (5.0)9 (4.1)<0.001
Cardiac disease severity‡
 MRC dyspnoea score ≥3, N (%)110 (50.2)45 (20.5)21 (9.6)3 (1.4)<0.001
Medication use, N (%)‡
 Aspirin166 (75.5)168 (76.4)173 (78.6)186 (84.6)0.086
 Clopidogrel159 (72.3)164 (74.6)173 (78.6)184 (83.6)0.025
 β-Blocker174 (79.1)181 (82.3)178 (80.9)180 (81.8)0.837
 Statin169 (76.8)184 (83.6)190 (86.4)195 (88.6)0.005
 ACE-inhibitors/AT-II-receptor block111 (50.5)111 (50.5)107 (48.6)100 (45.5)0.689
 Furosemide/aldosterone antagonist93 (42.3)64 (29.1)35 (15.9)27 (12.3)<0.001
 Antidepressants53 (24.1)24 (10.9)9 (4.1)8 (3.6)<0.001
 Secondary prophylactic medication146 (66.4)160 (72.7)162 (73.6)166 (75.5)0.163
Potential behavioural mediators‡
 Alcohol consumption >14/21 units/week, N (%)8 (3.6)12 (5.5)8 (3.6)14 (6.4)0.438
Smoking status, N (%)
 Current54 (24.8)49 (22.4)44 (20.0)30 (13.6)
 Past124 (56.9)122 (55.7)121 (55.0)128 (58.2)
 Never40 (18.4)48 (21.9)55 (25.0)62 (28.2)0.048
Intake of fruit and vegetables ≥3 portions/d, N (%)69 (31.4)75 (34.1)86 (39.1)100 (45.5)0.013
Intake of fish ≥3 times/day, N (%)61 (27.7)78 (35.5)93 (42.5)96 (43.8)0.001
Intake of fish oil supplement, N (%)57 (25.9)50 (22.7)75 (34.1)69 (31.4)0.035
Physical activity, days/week, mean (SD)3.6 (2.8)5.1 (2.3)5.3 (2.1)5.7 (1.8)<0.001
Participation in phase two cardiac rehabilitation‡110 (50.2)119 (54.1)144 (65.5)142 (64.8)0.001
  • *First quartile had the lowest MCS score; Fourth quartile had the highest MCS score.

  • †Totals may not sum to their respective totals due to missing data. No variable had more than 3.3% missing data.

  • ‡Information collected 3 months after MI.

  • §Norm-based scoring (1998 US population) using weights derived from confirmatory factor analysis.

  • ¶Information collected in the year before MI (in 2008).

  • **Information collected at the time of MI.

  • ††Redeemed prescription for at least two classes of antihypertensive drugs between MI and 180 days before.

  • ‡‡Redeemed prescription for antidepressants between MI and 180 days before.

  • MRC, Medical Research Council; AT, angiotensin; HADS-A/D, Hospital Anxiety and Depression Scale-Anxiety/Depression; MCS, Mental Component Summary.