Table 6.
Socio-demographic and environmental associations independent of genes (monozygotic twin differences)
| Number of pairs discordant for the environmental variable | OR (95% CI) for the association between within-pair difference in (i) suicidal ideation and (ii) social/ demographic factors | |||
|---|---|---|---|---|
| Socio-demographic/ Environmental factor | All | Men | Women | |
| Widowed/ Separated/Divorced | 46 | 3.76 (1.94–7.30) | 10.19 (2.44–42.62) | 2.59 (1.26–5.36) |
| Years at school (⩾/>10) | 87 | 1.18 (0.69–2.02) | 1.25 (0.50–3.11) | 1.17 (0.59–2.32) |
| Urbanisation | 36 | 0.95 (0.40–2.25) | 2.08 (0.35–12.36) | 0.77 (0.31–1.94) |
| Underemployed (2–10mths work in past 12 mths) | 118 | 1.35 (0.85–2.14) | 0.87 (0.37–2.03) | 1.63 (0.94–2.84) |
| Unemployed (0–1mths) | 174 | 0.97 (0.66–1.43) | 0.47 (0.18–1.25) | 1.10 (0.74–1.62) |
| Life event a | 390 | 1.50 (1.22–1.84) | 1.43 (0.99–2.06) | 1.54 (1.20–1·97) |
| Standard of living (binary, lower 2/5th v. upper 3/5th) | 169 | 1.63 (1.10–2.40) | 2.36 (1.18–4.75) | 1.40 (0.88–2.23) |
Based on N = 824 pairs of MZ twins; of whom 151 pairs (18.3%) were discordant for suicidal ideation.
Note no significant sex interaction terms were found. Bold values indicate p < 0.05.
a
Life events were categorized into 0, 1, or 2 or more events per person.