Table 5. Estimated odds ratios (ORs) for S. aureus nasal colonization by waist circumference (WC) in age tertiles of women and men, The Tromsø Staph and Skin Study (n = 3,775)a.
| Women (n = 2,115) a | Men (n = 1,660) a | |||||||
| WC- quintilesb | Total | Colonized | Total | Colonized | ||||
| n a | n a(%) | ORc (95% CI) | n a | n a(%) | ORc (95% CI) | |||
| 30–43 years | ||||||||
| 1st quintile | 160 | 30 (18.8) | ref | 139 | 67 (48.2) | 1.88 (1.08–3.28) | ||
| 2nd quntile | 156 | 41 (26.3) | 1.36 (0.78–2.39) | 115 | 38 (33.0) | 1.08 (0.60–1.94) | ||
| 3rd quintile | 125 | 27 (21.6) | 1.13 (0.62–2.05) | 123 | 54 (43.9) | 1.81 (1.03–3.21) | ||
| 4th quintile | 115 | 29 (25.2) | 1.45 (0.80–2.64) | 99 | 31 (31.1) | ref | ||
| 5th quintile | 108 | 35 (32.1) | 2.12 (1.17–3.85) | 84 | 38 (45.2) | 1.88 (1.01–3.49) | ||
| Ptrend | 0.03 | 0.68 | ||||||
| 44–59 years | ||||||||
| 1st quintile | 119 | 21 (17.7) | ref | 92 | 38 (41.3) | ref | ||
| 2nd quntile | 156 | 39 (25.0) | 1.93 (0.99–3.74) | 106 | 37 (34.9) | 0.76 (0.42–1.38) | ||
| 3rd quintile | 122 | 22 (18.0) | 1.35 (0.64–2.82) | 134 | 52 (38.8) | 0.89 (0.51–1.56) | ||
| 4th quintile | 152 | 33 (21.7) | 1.74 (0.88–3.44) | 119 | 45 (37.8) | 0.95 (0.53–1.69) | ||
| 5th quintile | 124 | 29 (23.4) | 2.03 (1.00–4.11) | 120 | 47 (39.2) | 0.90 (0.50–1.62) | ||
| Ptrend | 0.15 | 0.95 | ||||||
| 60–87 years | ||||||||
| 1st quintile | 104 | 25 (24.0) | ref | 79 | 16 (20.3) | ref | ||
| 2nd quntile | 139 | 32 (23.0) | 0.85 (0.43–1.71) | 78 | 27 (34.6) | 2.62 (1.18–5.80) | ||
| 3rd quintile | 151 | 32 (21.2) | 0.76 (0.38–1.50) | 120 | 29 (24.2) | 1.31 (0.61–2.80) | ||
| 4th quintile | 182 | 43 (23.6) | 0.88 (0.46–1.68) | 116 | 36 (31.0) | 1.65 (0.78–3.49) | ||
| 5th quintile | 202 | 46 (22.8) | 0.88 (0.45–1.69) | 136 | 47 (34.6) | 1.93 (0.94–3.98) | ||
| Ptrend | 0.85 | 0.34 | ||||||
n, numbers; CI, confidence interval.
P for interaction using WC quintiles as Ptrend and age tertiles (middle versus lowest), among women: 0.58 and men: 0.69; age tertiles (highest versus lowest), among women: 0.19 and men: 0.32.
a
Numbers may vary due to missing information.
b
WC quintiles (cm); Women: 1st <80, 2nd 80–86, 3rd 87–92, 4th 93–100, 5th ≥101; Men: 1st <91, 2nd 91– 95, 3rd 96–101, 4th 102–107, 5th ≥108.
c
Multivariable logistic regression model including: current smoking (yes/no), diabetes mellitus (yes/no), education level (< or ≥ college/university degree), and household income (< or ≥ level of the lowest income quintile).