Table 3 Relative Rates (RR) and 95 % confidence intervals (95 % CI) of Crude and Age-adjusted Rates, Non-enrolled group

 Non-enrolled vs. SC^a (crude)

4.5 (4.2–4.8)

Non-enrolled vs. NSC^a (crude)

6.1 (5.9–6.4)

SC vs. NSC^a (crude)

1.4 (1.3–1.5)

 Non-enrolled vs. SC^a (adjusted)

2.1 (1.9–2.2)

Non-enrolled vs. NSC^a (adjusted)

2.8 (2.6–2.9)

SC vs. NSC^a (adjusted)

1.3 (1.3–1.4)

  Non-enrolled vs. SC^a (crude)

1.9 (1.7–2.2)

Non-enrolled vs. NSC^a (crude)

3.8 (3.5–4.1)

SC vs. NSC^a (crude)

1.9 (1.7–2.2)

  Non-enrolled vs. SC^a (adjusted)

1.2 (1.1–1.4)

Non-enrolled vs. NSC^a (adjusted)

2.3 (2.1–2.6)

SC vs. NSC^a (adjusted)

1.9 (1.7–2.1)

  Non-enrolled vs. SC^a (crude)

3.3 (2.8–3.8)

Non-enrolled vs. NSC^a (crude)

6.7 (6.0–7.5)

SC vs. NSC^a (crude)

2.1 (1.7–2.4)

  Non-enrolled vs. SC^a (adjusted)

1.7 (1.5–2.0)

Non-enrolled vs. NSC^a (adjusted)

3.5 (3.1–3.9)

SC vs. NSC^a (adjusted)

2.0 (1.7–2.4)

 Non-enrolled vs. SC^a (crude)

2.3 (2.1–2.5)

Non-enrolled vs. NSC^a (crude)

4.5 (4.2–4.8)

SC vs. NSC^a (crude)

2.0 (1.8–2.2)

 Non-enrolled vs. SC^a (adjusted)

1.4 (1.3–1.5)

Non-enrolled vs. NSC^a (adjusted)

2.7 (2.5–2.9)

SC vs. NSC^a (adjusted)

1.9 (1.7–2.2)