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Table 2 Relationship between smoking pack-years in 2006 and factors and outcomes in main analysis a

From: Classical cardiovascular disease risk factors associate with vascular function and morphology in rheumatoid arthritis: a six-year prospective study

Factors in 2006

Smoking pack-years (2006)

Hypertension (2006)

No (n = 69)

2 (0 to 18)

Yes (n = 132)

4 (0 to 19)

P-value

0.439

Dyslipidaemia (2006)

No (n = 87)

2 (0 to 15)

Yes (n = 114)

3 (0 to 20)

P-value

0.774

Insulin resistance (2006)

No (n = 127)

2 (0 to 15)

Yes (n = 65)

10 (0 to 26)

P-value

0.020b

Diabetes (2006)

No (n = 194)

2 (0 to 18)

Yes (n = 7)

10 (0 to 35)

P-value

0.306

ESR (2006)

Coefficient

0.073

P-value

0.301

CRP (2006)

Coefficient

0.079

P-value

0.268

Ach (2012)

Coefficient

-0.141

P-value

0.050

SNP (2012)

Coefficient

-0.141

P-value

0.050

FMD (2012)

Coefficient

-0.074

P-value

0.313

GTN (2012)

Coefficient

-0.116

P-value

0.136

cIMT (2012)

Coefficient

0.190

P-value

0.014b

  1. aAch, acetylcholine; cIMT, carotid intima-media thickness; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; FMD, flow-mediated dilatation; GTN, glyceryl trinitrate–mediated dilatation; SNP, sodium nitroprusside. bSignificant at P < 0.05. Data on hypertension, dyslipidaemia, insulin resistance and diabetes are presented as median (25th to 75th quartiles), with P-values calculated using the Mann–Whitney U test. Data on ESR, CRP, ACh, SNP, FMD, GTN and cIMT are presented as Spearman’s correlation coefficient with associated P-values.