Table 1

Demographic and clinical characteristics of the study samplea
Characteristic Underweight (n = 57) Normal weight (n = 358) Overweight (n = 319) Obese (n = 162) F/χ2 p value
Age (years) 27.6 ± 8.5 27.1 ± 7.6 27.8 ± 6.6 27.8 ± 7.6 0.738 0.529
Male, N (%) 22(38.6) 162(45.3) 203(63.6) 106(65.4) 36.683 <0.001b
Marital Status, N (%) 3.931 0.686
 Married 37(64.9) 243(67.9) 197(61.8) 106(65.4)
 Never married 16(28.1) 94(26.3) 103(32.3) 49(30.2)
 Widowed, divorced, or separated 4(7.0) 21(5.9) 19(6.0) 7(4.3)
Education (years) 12.6 ± 2.8 12.5 ± 3.0 12.4 ± 2.9 12.9 ± 2.8 1.264 0.286
Occupation, N (%) 6.301 0.098
 Office worker 20(35.1) 159(44.4) 113(35.4) 66(40.7)
 Manual worker 37(64.9) 199(55.6) 206(64.6) 96(59.3)
Smoking cigarettes, N (%) 9(15.8) 53(17.4) 61(19.1) 31(19.1) 3.423 0.330
FBS (mg/dl) 88.8 ± 12.7 89.1 ± 12.0 89.3 ± 11.1 92.0 ± 18.8 0.809 0.489
SBP (kPa) 15.1 ± 1.0 14.9 ± 1.2 15.0 ± 1.2 15.2 ± 1.2 2.119 0.096
DBP (kPa) 9.9 ± 1.0 9.8 ± 0.8 9.9 ± 0.8 10.0 ± 0.8 1.996 0.113
DSM-IV diagnosis, N (%) 2.251 0.522
 Schizophrenia 52(91.2) 300(83.8) 273(85.6) 137(84.6)
 Schizophreniform disorder 5(8.8) 58(16.2) 46(14.4) 25(15.4)
Duration of illness (years) 2.2 ± 1.8 2.0 ± 1.7 2.1 ± 1.8 2.4 ± 1.8 1.706 0.164
PANSS total score 47.6 ± 16.5 44.8 ± 14.6 44.8 ± 14.6 46.0 ± 12.9 1.325 0.265
MADRS total score 5.0 ± 5.5 5.2 ± 5.7 5.1 ± 5.5 5.3 ± 5.5 0.106 0.956
Current medication, N (%) 7.063 0.070
 Typical antipsychotics 21(31.6) 109(30.4) 71(22.3) 39(24.1)
 Atypical antipsychotics 36(68.4) 249(69.6) 248(77.7) 123(75.9)
Mean daily doses of medication (clorpromazine quivalent, mg/d) 315.7 ± 107.3 320.8 ± 104.4 322.0 ± 113.0 331.3 ± 115.5 0.447 0.719
Body mass index (kg/m2) 16.5 ± 2.4 21.1 ± 1.9 24.9 ± 1.3 29.6 ± 2.4 2203.838 <0.001

aAsian BMI categories(kg/m2): underweight (< 18.5), normal weight(18.5-22.9), overweight (23–27.4) and obese (≥ 27.5); Data are presented as mean ± SD unless otherwise indicated. Percentages may not sum up to 100 because of rounding.

b underweight vs overweight, p < 0.001; underweight vs obese, p < 0.001; normal weight vs overweight, p < 0.001; normal weight vs obese, p < 0.001;

Abbreviation: FBS, fasting blood glucose; SBP, systolic blood pressure; DBP, diastolic blood pressure; DSM-IV, Diagnostic and Statistical Manual of Mental Disorders Fourth Edition; PANSS, the Positive and Negative Syndrome Scale; MADRS, Montgomery-Asberg Depression Scale.

Guo et al.

Guo et al. BMC Psychiatry 2013 13:109   doi:10.1186/1471-244X-13-109

Open Data