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Table 1 Regional distribution of patients with SMD and incidence of high risk behaviors of patients in rural households of Sichuan province in cohort, from 2006 to 2013a

From: Risk behavior in patients with severe mental disorders: a prospective study of 121,830 patients managed in rural households of western China

Regions Registered patients High risk behavior
Population (million) N1 Registration rate (‰) N2 No. of high risk behaviors Follow-up person years Incidence rate (%)
1 CD 4.59 18,588 4.05 752 3593 30,118.68 11.93
2 ZG 2.17 8039 3.70 271 508 12,620.50 4.03
3 PZ 0.52 853 1.64 83 138 622.63 22.16
4 LZ 3.56 7490 2.10 355 707 10,013.31 7.06
5 DY 2.75 7883 2.87 617 1225 12,933.39 9.47
6 MY 3.89 8916 2.29 430 901 15,157.51 5.94
7 GY 2.38 3897 1.64 447 1307 4971.04 26.29
8 SN 2.82 4645 1.65 159 279 6745.85 4.14
9 NJ 3.30 7745 2.35 303 652 13,035.34 5.00
10 LS 2.38 3637 1.53 384 994 4217.26 23.57
11 NC 5.82 7174 1.23 536 1362 7429.37 18.33
12 MS 2.53 5651 2.23 119 257 7523.61 3.42
13 YB 4.44 8093 1.82 631 1244 9646.55 12.90
14 GA 3.80 4392 1.16 292 424 5404.53 7.85
15 DZ 5.48 5630 1.03 221 667 7088.68 9.41
16 YA 1.14 1169 1.03 63 85 1382.37 6.15
17 BZ 3.12 4463 1.43 720 2167 6378.79 33.97
18 ZY 4.18 11,143 2.67 289 485 15,888.46 3.05
19 LY 4.46 2422 0.54 132 225 1386.21 16.23
Total 63.35 121,830 1.92 6804 17,220 172,564.09 9.98
  1. aPopulation refers to agricultural population in 2013
  2. N1: the number of registered patients with SMD
  3. Register rate: the rate of registered patients with SMD in local population. Limited by variable objective conditions, registration rate is lower than the prevalence rate of SMD. Register rate = N1/ Population
  4. N2: the number of high risk behavior patients in registered patients with SMD. As mentioned in 2.1.1, whether a patient is classified into a high risk group is according to the highest risk level in their follow-up period. If they were once, or more times, evaluated as L3 to L5, they were classified into a high risk group
  5. No. of high risk behaviors: the number of occurrences for high risk behavior in registered patients with SMD. In this study, there were 115,026 patients whose no. of high risk behaviors was 0, and the remaining patients with no. of high risk behaviors ranged from 1 to 40
  6. Follow-up person years: the sum of the years of follow-up time of registered patients with SMD
  7. Incidence rate: the incidence rate of high risk behavior in registered patients, and the follow-ups in person years were used as the denominator to define the incidence of high risk behavior. Incidence rate = No of high risk behaviors / Follow-up person years
  8. To avoid the values being too small, all incidence rates in Tables 1, 2, 3 and 4 were multiply by 100%