Table 1 Study characteristics of publications in meta-analysis

Landa and Garrett-Mayer [72]

≤ 1 SD mean: M-CDI or PLS

ADOS

OR = 3.57 (.70–18.16)

χ² = 1.60, p = .21

n/a

n/a

Iverson and Wozniak [115]

≤ 5th percentile: M-CDI words produced

n/a

OR = 37.00 (1.87–732.72)

χ² = 8.78, p = .003

n/a

n/a

Gamliel et al. [116]

≤ 2 SD mean: BSID or RDLS

ADOS-G

ADI-R

OR = 7.33 (1.50–35.86)

χ² = 5.94, p = .015

n/a

n/a

Mitchell et al. [45]

≤ 1.5 SD mean: MSEL or PLS

ADOS

DSM-IV-TR

OR = 1.65 (.50–5.47)

χ² = .29, p = .59

n/a

n/a

Toth et al. [117]

n/a

ADOS

ADI-R

DSM-IV-TR

n/a

54.50 (6.40)

46.55 (15.60)

48.45 (6.65)

49.07(12.24)

Stone et al. [118]

n/a

n/a

n/a

48.2 (10.8)

43.8 (12.6)

48.7 (10.5)

45.1 (11.1)

Paul et al. [119]

n/a

n/a

n/a

46.1 (7.2) 41.1 (9.7)

47.4 (12.0)

40.8 (10.7)

Curtin and Vouloumanos [120]

n/a

n/a

n/a

45.97 (7.11)

42.16 (7.14)

53.93 (10.47)

49.87 (11.04)

Messinger et al. [66]

n/a

ADOS

MSEL

n/a

27.28 (5.12)

24.63 (5.67)

25.78 (5.29)

24.11 (5.78)